Fugue analysis

Mathieu Giraud, Richard Groult, Florence Levé

We present here a computational analysis of fugues. We try to automatically analyze the structure of fugues. Our primary test set is the 24 fugues of the first book of Bach's Well-Tempered Clavier (WTC), BWV 846-893. It is a work-in-progress – some subjects (S) or counter-subjects (CS) are badly predicted, some episodes are missing. If you look for a complete musicological analysis of fugues, follow the links below each diagram to access S. Bruhn's or E. Prout's analysis.

On the following diagrams, the bottom part (soprano/alto/tenor/bass, and sequences) shows the output of our method. The top part (the truth lines) show a ground truth analysis, based on the analysis of S. Bruhn. For more information, and discussion on this method and its results, please read [1] and [2] in the bibliographical references.

Parameters

### fugue.py -w -T -a -
## 2012-06-19 17:16:21.313199
## PitchDiatonic (S/CS)
## PitchQPI (episodes)

Fugue mozart-k-546-fuga

     [S]           Subject (13 notes, 19 occ.)  { | g,4 g, c, d,16 ef, f,16 g, | af,4 af, b,, r8 af, | fs,8 g, }  
     [Sinv]  inverted subject (13 notes, 12 occ.)   
     [CS]   Counter-subject (19 notes, 3 occ.)  { f,8 d, ef, cs, d, | b,,8 c, r c,,16 d,, ef,,4 c,, r8 c, c, c, c,4. b,,16 c, | bf,,4 a,, }  

                             1                   2                   3                   4                   5                   6                   7                   8                   9                   10                  11                              
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9             
  soprano  S12-CS18---               S12--                                             Sinv12                   S12--                                                             S12--Sinv12  S12--      Sinv12              S12--                                 
     alto        S11-CS17---                    S12--                            Sinv12                                       Sinv12                                            S12--               S12--                                                            
    tenor              S12-CS16---                          S12--                       Sinv12                            S12--                           Sinv12      Sinv12  S12--                                                                                  
     bass                    S11--                    S12--                     Sinv12                             Sinv12                                  S12--       S12--        Sinv12       S12--                               Sinv12                         
           I     IV    I     IV      I          III   IV    V                                                   I         IV                               I           IV     V V V            I V  V                         I                                      
 detected                                   =-+ =-                     ==--                  =-+   ==--++ ==--++                                 ==--++                    =-                                     ==--          =-+-+  =-+                           
sequences                                                                                                                                                                                                                          =-+   ====----                    
                                                                                                                                                                                                                                     =+                              

Full logScores from IMSLPYouTube

Fugue wtc-i-01--bwv-846

     [S]           Subject (14 notes, 21 occ.)  { c8 d e f8. g32 f e8 a | d8 g8. a16 g16 f e16 }  

                                               1                                       2                                          
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7              
cad-truth                                                                                            +                            
  S-truth        S-----            S-----                              S-----            S-----                                   
  A-truth  S-----                          S-----S-----        S-----    S-----    S-----                S-----                   
  T-truth              S-----      S-----              S-----  S-----      S-----  S-----    S-----    S-----                     
  B-truth                    S-----              S-----            S-----    S-----                                               
                                                                                                                                  
                                               1                                       2                                          
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7              
  soprano        S13---            S13---                               S13---            S13---                                 
     alto  S13---                          S13--- S13---       S13---    S13---     S13---               S13---                   
    tenor              S13---       S13---             S13---              S13---  S13---    S13---    S13---                     
     bass                    S13---              S13---                     S13---                                               
           I     V     V     I     IV      V     VII   III     I        IV VI      VI     V  VII       I IV                       
 detected                                    ==--                                                                                 
sequences                                                                                                                         
                                                                                                                                  

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-02--bwv-847

     [S]           Subject (20 notes, 8 occ.)  { c'16 b c'8 g af c'16 b c'8 d' | g8 c'16 b c'8 d' f16 g af4 g16 f | ef16 }  
     [CS]   Counter-subject (20 notes, 5 occ.)  { c'16 b16 a g16 f ef16 d c8 ef' d' c' | bf8 a bf c' fs g a fs | g4 }  

                                               1                                       2                                       3                  
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1              
cad-truth                                                                                                                  +                      
  S-truth          S-------       CS-------        S-------        CS------            S-------                  CSCS2---    S-------             
  A-truth  S-------CS------          CS2---          CS2---        S-------            CS------                    CS----                         
  T-truth                          S-------        CS------          CS2---              CS2---                  S-------                         
                                                                                                                                                  
                                               1                                       2                                       3                  
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1              
  soprano          S17-----       CS19----         S19-----        CS18----            S19-----                              S19-----             
     alto  S19-----CS19----                                        S17-----            CS19----                                                   
    tenor                          S19-----        CS19----                                                      S19-----                         
           I       V               I               III             V                   I                         I           I                    
 detected                    ==--          ====----++      ==--++--        ==--++              ====----                                           
sequences                                                  ====----              ==--++                                                           
                                                                                                                                                  

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-03--bwv-848

     [S]           Subject (17 notes, 12 occ.)  { gs8 as16 gs fs16 gs es'8 cs' | gs8 fs16 es fs8 ds' es cs' ds bs | cs8 }  
     [CS]   Counter-subject (25 notes, 7 occ.)  { cs'16 bs cs'16 ds' es'16 fs' gs'16 fs' es'16 fs' gs'16 fs' es'16 ds' | es'3! ds'16 cs'16 es' ds'16 cs' bs16 ds' cs'16 bs cs'16 }  

                             1                   2                   3                   4                   5                      
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5            
  S-truth  S---CS--CS2-      S---    CS--      CS2-       S---CS--                           S---CS--CS2-       S---                
  A-truth      S---CS--      CS--              S---        CS2----                               S---CS--       CS--                
  T-truth          S---      CS3-    S---      CS--       CS--CS2-                            CS-CS2-S---       CS3-                
                                                                                                                                    
                             1                   2                   3                   4                   5                      
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5            
  soprano  S16-CS24          S15--   CS24                 S16-CS20                           S16-CS24           S15--               
     alto      S15-CS22                        S16-           S15-                               S16-CS22                           
    tenor          S16-              S15-      CS21                                                  S16-                           
           I   IV  I         VII     V         III        V   I                              I   V   I          III                 
 detected              ==--+             ==--++                   =-   ==--++- ==--+   ==--++              ==--                     
sequences                                     =-                                                                                    
                                                                                                                                    

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-04--bwv-849

     [S]           Subject (5 notes, 14 occ.)  { | cs,1 | bs,,2 e, | ds,1 | cs,4 }  
     [CS]   Counter-subject (14 notes, 2 occ.)  { ds,4 e,2. ds,8 cs, ds,4 gs, | cs,4 ds,8 e, fs,2. e,4 ds, cs, | ds,2 }  

                             1                   2                   3                   4                   5                   6                   7                   8                   9                   10                  11                      
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5             
cad-truth                                                                                                                                                                                                                               +                    
  S-truth                             S-----                                                               S-----              S-----        S-----              S-----                    S-----    S----S-----              S-----                         
  A-truth                         S-----                                                         S-----              S-----                                                                             S-----                           S-----              
  T-truth               S-----                              S-----        S-----      S-----                                                                                                                                                                 
  B-truth        S-----CS------                S-----  S-----                  S-----                          S-----                                                      S-----                               S-----                                       
 B2-truth  S-----CS-------                                          S-----                                                                                 S-----                                         S-----                                             
                                                                                                                                                                                                                                                             
                             1                   2                   3                   4                   5                   6                   7                   8                   9                   10                  11                      
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5             
  soprano               S04---        S04---                                                                                                                                                                                                                
     alto        S04---CS13----                                                                                                                                                                                                                              
    tenor  S04---CS13----                                   S04----       S04----                                                                                                                                                                           
     bass                                       S04---S04----                   S04---                          S04---                                                     S04---                                                                           
    bass2                                                           S04---                                                                                 S04---                                           S04---                                         
           I     V      I             I         V     IV    I       VII   III   I                               IV                                         I               I                                I                                                
 detected                                                                        ====----    ==--      ==--        ==--              ==--+     ==--                             ====----         ==--                                                        
sequences                                                                             ==--                          ====----+                                                        ==--                                                                    
                                                                                                                                                                                                                                                             

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-05--bwv-850

     [S]           Subject (9 notes, 35 occ.)  { d,32 e, fs, g, fs,32 e, fs, d, b,8. }  
     [CS]   Counter-subject (6 notes, 8 occ.)  { b,16 a,8. g,16 | fs,8. g,16 fs,8. }  

                                               1                                       2                                          
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7              
cad-truth                                                                  +                                       +              
  S-truth                   S--         S--         S--CS2- S--CS2v                                                               
  A-truth               S--CS2-        CS2-             S--CS2vCS3-CS3v                                                           
  T-truth       S--    CS2-CS3-    CS--CS3-                     S--CS3v                                                           
  B-truth   S--CS--    CS--CS--     S--CS--        CS--CS--CS--CS-- S--                                                           
                                                                                                                                  
                                               1                                       2                                          
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7              
  soprano                   S08    CS04 S08         S08-    S08            S07 S08 S08 S08          S07 S07                       
     alto               S08-                            S08-                            S08                                       
    tenor       S08             S07CS03                         S08                      S07                                     
     bass   S08--                   S08    S08 S08 S08     S07      S08-              S07-       S07S07-                   
            I   V       I   V   III I   VI VI  V   IV   I  VI   IV  II     II  V   IV IIVI       VIIVIV IVIII                     
 detected                      ==--        ====----                        ====----++++                    ==--                   
sequences                                                                                                                         
                                                                                                                                  

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-06--bwv-851

     [S]           Subject (12 notes, 11 occ.)  { d8 e f g e | f16 d cs16 d bf4 g | a3! }  
     [Sinv]  inverted subject (12 notes, 3 occ.)   
     [CS]   Counter-subject (21 notes, 2 occ.)  { g16 f16 e g16 f e16 d | e8 c'8. b16 a16 b b16 a gs16 a | a16 g fs16 g e'4 }  

                                      1                             2                             3                             4                         
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4             
cad-truth                                                              +                                                                 +                
  S-truth  S-----CS----   CS*---S-----         S-----CSh   CShCSh      CShSinv--CSv      Sinv--   CSh         CShSh-         CShCSh                       
  A-truth        S-----      CS*---         Shinv Sinv--      S-----               Shinv    S-----         Sh-   Shinv          S-----   Sh-              
  T-truth                 S-----CS----         CShSh-      S-----CSh   S-----Sinv--   Shinv-   Sinv--         Sv----         S-----CSh                    
                                                                                                                                                          
                                      1                             2                             3                             4                         
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4             
  soprano  S11--- CS20--        S10---         S11---                                                                                                     
     alto        S11---                           Sinv10      S11---                        S11---                              S11---                    
    tenor                 S11--- CS17--                    S11---      S10---Sinv10            Sinv09                        S11---                       
           I     V        I     II             V           V  V        V                    I                                I  I                         
 detected                           ====--++                                                       ====--++       ====--++++-                             
sequences                                                                                                                                                 
                                                                                                                                                          

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-07--bwv-852

     [S]           Subject (16 notes, 9 occ.)  { | bf16 g f16 g ef16 af g16 af c'8 bf r a16 f | ef'8 d' c'4 bf16 }  

                             1                   2                   3                          
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7            
cad-truth                                  +                                    +               
  S-truth  S-- CS-            S---          CS-              CS-  S---                          
  A-truth      S--   CS-                    S--   CS2              CS-      S---                
  T-truth            S--       CS-                S--       S---                                
                                                                                                
                             1                   2                   3                          
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7            
  soprano  S15                S13-                                S14-                          
     alto      S13                          S13                             S13-                
    tenor            S15                          S15       S13-                                
           I   IV    I        IV            II    VI        IV    VII       IV                  
 detected         =-    ==--+     ==--+         =-   ==--       =-+   ==--+                     
sequences                             =-+-+              =-+              =-+                   
                                                                                                

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-08--bwv-853

     [S]           Subject (9 notes, 18 occ.)  { | ds4 as4. b8 as gs | fs8 gs as4 ds }  
     [Sinv]  inverted subject (9 notes, 9 occ.)   
     [Saug] augmented subject (9 notes, 3 occ.)   

                             1                   2                   3                   4                   5                   6                   7                   8                          
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7            
cad-truth                                      +                                                                                                                                                    
  S-truth       S-----                           S-----  S----S------Sinv--                        Sinv--Sinvrhv  S---Sinv  S-----        Sinv--    S-----          Saug------                      
  A-truth  S-----                               S-----    Srhv--S-----           Sinv--                 Sinv--   S---Sinv-          S-----      Saug------S-----   Srhv-- S-----                    
  T-truth                S-----  S-----                                                Sinv--     Sinv--         S---Sinv            Saug------S-----              S-----                           
                                                                                                                                                                                                    
                             1                   2                   3                   4                   5                   6                   7                   8                          
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7            
  soprano       S06                              S08     S07  S07-   Sinv07                        Sinv08         S07 Sinv07S07-          Sinv07    S07-            Saug07                          
     alto  S08                                  S08             S07              Sinv07                 Sinv08   S07-Sinv07         S07-        Saug07                    S07-                      
    tenor                S08     S06-                                                  Sinv06     Sinv08         S07                 Saug07    S07                 S07-                             
           I    V        I       V              VV       II   I IV                                               VV         II      II         IV   VII            II     V                         
 detected                                                                                                                                                                      ==--+                
sequences                                                                                                                                                                           =-+             
                                                                                                                                                                                                    

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-09--bwv-854

     [S]           Subject (18 notes, 10 occ.)  { e8 fs4 r16 b, cs16 ds | e16 ds e16 fs gs16 a b16 gs e16 ds e16 fs e16 }  

                                               1                                       2                                                  
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9              
cad-truth                  +                               +                                                                              
  S-truth       S--               S--                                                   S--                 S--                           
  A-truth   S--                       S--                               S--                 S--                                           
  T-truth             S--                     S--                                   S--                                 S--               
                                                                                                                                          
                                               1                                       2                                                  
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9              
  soprano       S17---            S17---                                                S14----             S16---                        
     alto   S17---                    S17---                            S17---              S17---                                        
    tenor             S17---                                                        S17---                                                
            I   V     I           I   V                                 VI          I   I   I               I                             
 detected            ==--                                  ====----++++    ====----              ====----        ==--++                   
sequences                                                                                          ==--++--                               
                                                                                                   ====----                               

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-10--bwv-855

     [S]           Subject (26 notes, 8 occ.)  { | e16 g b16 e' ds'16 e' d'16 e' cs'16 e' c'16 e' | b16 e' ds'16 e' as16 cs' g16 fs g16 as fs16 e | d8 b }  

                                      1                             2                             3                             4                   
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2             
  S-truth  S------CS---                  S------CS---                CS---S------                  CS---S------                                     
  A-truth        S------                  CS---S------              S------CS---                  S------CS---                                      
                                                                                                                                                    
                                      1                             2                             3                             4                   
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2             
  soprano  S25----                       S25----                          S25----                       S24----                                     
     alto        S25----                       S24----              S25----                       S25----                                           
           I     V                       III   VII                  IV    I                       VII   IV                                          
 detected              ======------+++               ======------               ======------+++               ======------                          
sequences                                                        ==-                                                      ==-                       
                                                                                                                                                    

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-11--bwv-856

     [S]           Subject (15 notes, 10 occ.)  { c8 | d8 c bf, | c8 e,16 f, g,16 a, | bf,8 c16 bf, a,16 g, | a,16 }  
     [CS]   Counter-subject (19 notes, 3 occ.)  { g,16 f,16 g, a,16 bf, | c16 bf, a,16 bf, c16 d | e16 g f16 e d16 c | b,4. | c8 }  

                                      1                             2                             3                             4                             5                             6                             7                     
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2               
cad-truth                                                                                                                                            +                            +                                                             
  S-truth                S----------    CS--------              S---------CS--------       CS---                         S----------                               S----------                               S----------                        
  A-truth    S---------CS--------                                CS----     S----------       S----------                      S----------                   S----------                                                                        
  T-truth                               S----------                   CS---             S---------CS----                             S----------       S----------                                                                              
                                                                                                                                                                                                                                                
                                      1                             2                             3                             4                             5                             6                             7                     
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2               
  soprano                S13-------                             S14-------CS18--------                                   S14-------                                                                                                             
     alto    S14-------CS18--------                                         S13-------        S14-------                       S14-------                                                                                                       
    tenor                               S14-------CS18--------                          S14-------                                   S14-------                                                                                                 
             I           IV             I                       I           IV          I     I                          VI    VI    VI                                                                                                         
 detected                                         ===---                                             ======------+++                                                                           ===---+++               ===---                   
sequences                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                                

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-12--bwv-857

     [S]           Subject (10 notes, 10 occ.)  { c4 df c | b,4 e f bf, | a,4 af, g,2 }  
     [CS]   Counter-subject (27 notes, 4 occ.)  { | f,8 f,16 g, af,8 af,16 bf, c16 b,, c,16 d, ef,4 r16 c, d,16 ef, f,4 r16 ef, f,16 g, af,4 r16 g, a,16 b, c4. b,16 a, b,4 | c8 }  

                             1                   2                   3                   4                   5                            
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8            
  S-truth                          S-----       CS*---           CS2*--       CS*---                   S-----       CS----                
  A-truth        S-----CS----       CS3---     CS*----          CS2*---      S-----                    CS----                             
  T-truth  S-----CS----CS2---      CS2---      S-----           CS----       CS*---       S-----        CS2---                            
  B-truth              S-----      CS----                       S-----                                             S-----                 
                                                                                                                                          
                             1                   2                   3                   4                   5                            
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8            
  soprano                          S09--                                                               S09--                              
     alto        S08-- CS25--                                                S09--                                                        
    tenor  S09-- CS26--                        S09--            CS23--                    S09--                                           
     bass              S09--       CS25--                       S09--                                              S09--                  
           I     IV    I           I           V                I            III          VII          V           I                      
 detected         ==--  ==--        ==-- ==--++ ==--  ==--+      ==--  ==--+  ==-- ==-- =-      ==--++  ==--        ==--                  
sequences                                                                                                                                 
                                                                                                                                          

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-13--bwv-858

     [S]           Subject (16 notes, 7 occ.)  { cs'8 fs' es' fs' es'16 ds' cs'8. b32 cs' | ds'4 r8 cs' b as gs cs' | as8 }  
     [CS]   Counter-subject (25 notes, 2 occ.)  { fs16 fs' es'16 fs' gs'16 ds' es'16 fs' gs'8. fs'16 es'16 ds' | cs'16 ds' es'16 bs cs'16 ds' es'16 cs' as16 bs cs'4 bs8 | cs'2! }  

                             1                   2                   3                      
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5            
cad-truth                      +                      +                                     
  S-truth  S---CS--             S---     CScont  CS--             CS2   S---                
  A-truth      S---CS--        CS--    S---       CS2            S---     CScont            
  T-truth          S---          CS2  CS--       S---                  CSv                  
                                                                                            
                             1                   2                   3                      
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5            
  soprano  S15-CS24                                                     S15-                
     alto      S14-CS23                S15-                      S15-                       
    tenor          S14-                          S14-                                       
           I   IV  I                   V         VI              IV     I                   
 detected                 =-+     = ==--     =-+       ==--+ =-+-    ==--                   
sequences                                                    ==--                           
                                                                                            

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-14--bwv-859

     [S]           Subject (18 notes, 6 occ.)  { fs,4 gs, a,1 gs,8 as, b,2 as,8 gs, as, bs, | cs4. b,8 a, cs b, a, gs,2 | fs,2. }  
     [Sinv]  inverted subject (18 notes, 2 occ.)   
     [CS]   Counter-subject (20 notes, 5 occ.)  { cs8 cs b, b, as, | as,8 b, b, a, a, gs, gs,2! as,8 | bs,8 cs ds4 gs, cs2 bs,4 | cs4. }  

                                      1                             2                             3                             4             
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0             
cad-truth                                                           +                                                                         
  S-truth                                            S---------                    S---------   CSv-------             S---------             
  A-truth           S---------   CS--------                           Sinv-----     CS-------- CS2v-----                CSv-------            
  T-truth  S---------CS-------- CS2------                CS2-------                            S---------              CSh------              
  B-truth                       S---------           CSh--------                                        Sinv------                            
                                                                                                                                              
                                      1                             2                             3                             4             
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0             
  soprano           S17------    CS19----            S17------                                  CS18-----              S17------              
     alto  S17------ CS19----                                         Sinv17---      CS19----                                                 
    tenor                       S17------                                                      S17------                                      
     bass                                             CS19----                                          Sinv17---                             
           I        V           I                    I                                         I                       I                      
 detected                    ==-               ===---                       ====--+                              ===---                       
sequences                       ==-++                                                                                                         
                                                                                                                                              

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-15--bwv-860

     [S]           Subject (31 notes, 4 occ.)  { | g8 a16 g fs16 g a8 b16 a g16 a | b8 a g d c'4 | b8 a g fs e'4 | d'8 e'16 d' c'16 b a8 c'16 b a16 g | fs8 }  
     [Sinv]  inverted subject (31 notes, 2 occ.)   

                                      1                             2                             3                             4                             5                             6                             7                             8                               
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6             
cad-truth                                                                                                                                                                                                                                                     +                         
  S-truth  S-----------CS----------                                             Sinv--------                              S-----------                           S-----------                  Sv----                                             S-----------                          
  A-truth              S-----------                               Sinv----------                                                         S-----------                                       S-----------                                    Sinv--------                                
  T-truth                                S-----------                                       Sinv--------                                                         S-----------                                          S-----------            Sinv--------                             
                                                                                                                                                                                                                                                                                        
                                      1                             2                             3                             4                             5                             6                             7                             8                               
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6             
  soprano  S30---------                                                         Sinv29------                              S30---------                                                                                                                                                  
     alto              S30---------                               Sinv29-------                                                                                                                                                                                                         
    tenor                                S30---------                                                                                                                                                                                         
           I           V                 I                                                                                VI                                                                                                                                                            
 detected              ==-                              ==-                     ==-            ===---                  ==-   ===---   ==-++-            ===---+++         ==-                               ====---        ====---    ==-   ==-      ==-                                
sequences                                                  ===---+++                               ====--++++-                        ===---                                 ==-                               ==-++--                                                                  
                                                                    ==-                                       ==-                           ==-++-                                                                                                                                      

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-16--bwv-861

     [S]           Subject (11 notes, 14 occ.)  { d8 ef g, fs,4 g, r8 a,16 bf, c8 bf,16 a, bf,4 }  
     [CS]   Counter-subject (11 notes, 3 occ.)  { g,4 r8 a,16 g, f,8 g,16 a, bf,8 g, e, cs | d4. }  

                                               1                                       2                                       3                               
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4               
  S-truth        S-----      CS--                                  S-----                    S-----  CS--              S-----                                  
  A-truth  S-----  CS--                                S-----              CSext---      CS--      S-----                CSv-        S-----                    
  T-truth                        S-----                  CS--  CS--                                                      S-----            S-----              
  B-truth                  S-----  CS--                      S-----  CS--  S-----      S-----  CS--                                    CS--                    
                                                                                                                                                               
                                               1                                       2                                       3                               
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4               
  soprano        S09---                                            S10---                    S10---                    S09---                                 
     alto  S10--- CS10-                                S10---                S09---                                                  S10---                   
    tenor                        S09---                                                                                  S10---                               
     bass                  S10--- CS10-                      S09--- CS10-  S10---      S10---                                                                  
           I     IV        I     IV                    III   VI    VII     III         IV    IV                        I I           I                         
 detected                            ==--                                  ==--                          ====----++++                                          
sequences                                                                                                                                                      
                                                                                                                                                               

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-17--bwv-862

     [S]           Subject (7 notes, 15 occ.)  { af,8 ef c af, f df | ef3! }  
     [CS]   Counter-subject (16 notes, 3 occ.)  { df16 c16 df ef16 f g16 ef af16 bf c'16 bf | af16 g f16 af g2 }  

                             1                   2                   3                       
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5             
cad-truth                               +             +                        +             
  S-truth          S-                                    S-          S-     S-               
  A-truth            S-            S-        S-        S-          S-                        
  T-truth  S-                S-            S-                    S-                          
  B-truth    S-                                                S-                            
                                                                                             
                             1                   2                   3                       
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5             
  soprano          S06                                   S05         S05    S06             
     alto            S04           S06       S05       S05         S05                      
    tenor  S06--             S06           S06           CS12    S05                        
     bass    S04 CS14                                          S06                           
           I V     I V       I     VI      IIVI        V I     I VII III    I                
 detected                      ==--   =-           =-      =-+                               
sequences                       =-+-                                                         
                                ==--                                                         

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-18--bwv-863

     [S]           Subject (15 notes, 12 occ.)  { gs,4 fs,8 gs,16 as, b,8 as, | gs,8 cs ds fs, gs, gs, as, as, | ds,8 }  
     [CS]   Counter-subject (15 notes, 5 occ.)  { es,8 fs,4. e,16 fs, gs,8 fs,16 gs, | as,8 gs,16 as, b,8 gs, as, r fs, | r8 gs, }  

                             1                   2                   3                   4              
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1            
cad-truth                                                                              +                
  S-truth          S---CS--    CS--     CS2-             S---             CS2-     S---                 
  A-truth      S---CS--        CS2-    CS--    S---                       CS--     CS2-                 
  T-truth  S---CS--CS2-        S---        S--- CS--                     S---                           
  B-truth              S---            S---                  S---                                       
                                                                                                        
                             1                   2                   3                   4              
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1            
  soprano          S14-CS14    CS14                      S14-                      S14--                
     alto      S13-CS13                        S13-                                                     
    tenor  S14-CS14            S13-        S14-CS14                      S14-                           
     bass              S13-            S14-                  S13-                                       
           I   V   I   V       V       IV  I   V         V   VII         I         IV                   
 detected                 ==--+   ==--+           ==--++         ==--                                   
sequences                                                            ==--                               
                                                                                                        

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-19--bwv-864

     [S]           Subject (11 notes, 12 occ.)  { | a8 r4. gs8 cs' a d' b | e'8 cs' fs' e' a' }  

                                      1                             2                             3                             4                             5                         
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4             
cad-truth                          +           +        +           +                                               +                                      +                            
  S-truth  S-----                  S-----                                          Sext--                                                                                               
  A-truth     S-----                                                         CS----      Sext--      S-----                           S-----                                            
  T-truth           S-----S-----               Sext--   Sext--               S-----      CS----            Sext--                           Sext--                                      
                                                                                                                                                                                        
                                      1                             2                             3                             4                             5                         
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4             
  soprano  S10--                   S10--                                                                                                                                                
     alto     S08--                                                                S07-- S09--                                        S09--                                             
    tenor           S10-- S08--                S09--                         S10--  S07--                  S09--                                                                        
           I  V     I     V        I           VI                            I     VI    V                 IV                         VI                                                
 detected                                                                                              =-            =-                                                                 
sequences                                                                                                             ==--++--                                                          
                                                                                                                                                                                        

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-20--bwv-865

     [S]           Subject (31 notes, 14 occ.)  { a,16 gs, a,8 b, c c16 b, c8 d | e16 d c16 d e8 f gs, e, r a, | b,16 c a,16 b, c16 d b,16 c d8 c b, e | a,4 }  
     [Sinv]  inverted subject (31 notes, 5 occ.)   

                             1                   2                   3                   4                   5                   6                   7                   8                          
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7            
cad-truth                             +      +                  +       +                               +                                 +                                    +                    
  S-truth        S-----  CS*          Sinv--                    S-----                         S-----               Sinv--  Sinv--              Sinv--              Sinc   Sinc   Sinc              
  A-truth  S-----CS-       CS* CS-                       Sinv--         S-----     S-----                 Sinv--             Sinv--              Sinv--     Sinv-- Sinc   Sinc     Sinc             
  T-truth                      S-----        Sinv--              S-----           S-----                   Sinv--                     Sinvinc----           CS-  Sinvinc         Sinvinc            
  B-truth                S-----   Sparalel         Sinv--                S-----                 S-----             Sinv--            Sinvinc----           Sinv--               Sinvinc             
                                                                                                                                                                                                    
                             1                   2                   3                   4                   5                   6                   7                   8                          
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7            
  soprano        S30---                                         S30---                         S30---               Sinv30                      Sinv30                                              
     alto  S30---                                                       S30---     S30---                 Sinv30                                                                                   
    tenor                      S30---                            S30---           S30---                   Sinv30                          S30---                                                   
     bass                S30---                                          S30---                 S30---             Sinv30                 S30---                                                    
           I     V       I     V                                II      VV        II           III                                        IV                                                        
 detected                =-    =-     ==--                       =-                      =-          =             =-       =-    =-  =-         =-    =-   =-                                      
sequences                                                                                                                                                                                           
                                                                                                                                                                                                    

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-21--bwv-866

     [S]           Subject (38 notes, 8 occ.)  { f8 g f bf d | c8 a16 g bf16 a g16 f c'8 ef | d8 bf16 c' a16 bf c'16 d' ef'16 d' c'16 ef' | d'16 c' bf16 c' a16 bf c'16 d' ef'16 d' c'16 ef' | d'8. }  
     [CS]   Counter-subject (27 notes, 7 occ.)  { c'16 bf16 a bf16 c' d'8 f'4 bf8 a bf e' g'4 a16 bf c'8 c' c' c' | c'16 bf a16 bf c'8 c' c' c' | c'4 }  

                                      1                             2                             3                             4                                     
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8             
cad-truth                                                                                                                                             +               
  S-truth  S-----------CS----------CS2---------S-----------               CS----------CS2---------               CSinc-S-----------CS----------                       
  A-truth              S-----------CS----------CS2---------               S-----------CS----------               Sinc--CS----------S-----------                       
  T-truth                          S-----------CS----------               CS2---------S-----------               CS2incCS2---------CS2---------                       
                                                                                                                                                                      
                                      1                             2                             3                             4                                     
           1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8             
  soprano  S37---------CS26--------            S34---------               CS25--------                                 S37---------CS26--------                       
     alto              S34---------CS24--------                           S37---------CS22--------                     CS24--------S34---------                       
    tenor                          S37---------CS25--------                           S35---------                                                                    
           I           IV          I           IV                         VI          II                               IV          VII                                
 detected                                                  ===---                                 ===---+++                                    ===---                 
sequences                                                        ===---+++                                 ===---++                                                   
                                                                                                                                                                      

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-22--bwv-867

     [S]           Subject (10 notes, 11 occ.)  { | bf2 f r4 gf' f' ef' | df'4 c' df' ef' | f'4 }  
     [CS]   Counter-subject (6 notes, 2 occ.)  { e'8 f' g'2. af'8 g' f'2. }  

                             1                   2                   3                   4                   5                   6                   7                         
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6             
cad-truth                                                  +                       +        +                                                                                  
  S-truth  S-----                                          S-----                                            S-----                            S-----                          
  A-truth      S-----                                          S-----              S-----                    S-----    S-----                   S-----                         
  T-truth                    S-----                                                                  S-----            S-----                    S-----                        
  B-truth                        S-----                            S-----                                          S-----                         S-----                       
 B2-truth                              S-----                            S-----                         S-----                                     S-----                      
                                                                                                                                                                               
                             1                   2                   3                   4                   5                   6                   7                         
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6             
  soprano  S09---CS05                                      S08---                                                                               S09---                      
     alto      S07---          CS04                                                                                    S07---                    S06---                     
    tenor                                                                                                                                                                   
     bass                        S06---                            S08---                                          S07---                                                      
    bass2                              S08---                            S08---                                                                                            
           I   V                 V     I                   III     I     IV                                        V   I                        IV                             
 detected                                                                                                                ====----                                              
sequences                                                                                                                                                                      
                                                                                                                                                                               

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-23--bwv-868

     [S]           Subject (13 notes, 10 occ.)  { b,8 as, b, cs4 fs,8 gs,16 as, | b,8 cs16 ds e8 ds cs2 }  
     [Sinv]  inverted subject (13 notes, 2 occ.)   
     [CS]   Counter-subject (18 notes, 3 occ.)  { | b,4. cs16 b, as,16 gs, fs,16 e, ds,8 b, | as,8 b,16 cs ds16 es fs4 e16 ds e16 }  

                                               1                                       2                                       3                              
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4              
cad-truth                                  +                                   +                               +                                              
  S-truth                  S------- CS------                               CShvSinv----                                            S-------                   
  A-truth          S------- CS------                   CSh-            S-------        Sinv----                            S------- CS------                  
  T-truth  S------- CS------                         S-------                                          S-------                CShv                           
  B-truth                          S-------                                                  S-------                                                         
                                                                                                                                                              
                                               1                                       2                                       3                              
           1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4   5   6   7   8   9   0   1   2   3   4              
  soprano                  S12---   CS17---                                    Sinv12                                              S10---                     
     alto          S10---                                              S12---          Sinv11                              S12---  CS17----                  
    tenor  S12---  CS17---                           S12---                                             S12---                                                
     bass                          S10---                                                    S12---                                                
           I       V       I       V                 I                 V                     I          IV                 I       V                          
 detected                                                                                                                                                     
sequences                                                                                                                                                     
                                                                                                                                                              

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

Fugue wtc-i-24--bwv-869

     [S]           Subject (19 notes, 11 occ.)  { fs8 d b, g fs b as | e8 ds c' b fs es d' cs' | bs8 cs' a fs }  

                             1                   2                   3                   4                   5                   6                   7                         
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6             
  S-truth                          S-----                                            CS----                                                          CS----                    
  A-truth  S-----CS----                            S-----                                                                                                                      
  T-truth        S-----                                              S-----                      S-----            S-----        S-----                                        
  B-truth                  S-----                                                    S-----             S-----              S-----                   S-----                    
                                                                                                                                                                               
                             1                   2                   3                   4                   5                   6                   7                         
           1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6             
  soprano  S18--                   S16--                                                                                                                                      
     alto        S16--                              S18--                                                                                                                      
    tenor                                                  S18--                       S18--  S15--       S18--         S18--                                       
     bass                                                                                              S18--  S18--                     
           I     IV                IV               I      IV                          III    I        IV V   IV        I                                                      
 detected                                 =-               ==--++ ==--               =-+        ==--   =   =-                =-                                                
sequences                                   =-+                                                                                                                                
                                                                                                                                                                               

Full log – Analysis by S. Bruhn, by E. Prout, by The Pirate Fugues, by earsense.org – Scores from IMSLP : Autograph, BGA 1866YouTube

References