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96 Bass Accordion Chart

The 96 bass layout has 2 columns of single bass notes (Roots – also called Bass buttons – and Counter Basses), 4 columns of chords (Major, minor, Dominant 7th, diminished 7th), and 16 rows. Compared to the smaller model (the 80 bass layout), it can play diminished chords and has the same number of bass keys. The 96 bass accordions offer many of the features of a fully specific 120 bass instrument but in a relatively light and compact size.

 

If you are totally new to the Stradella bass system, read this article.

 


96 Bass Accordion Layout

(Click to enlarge)

96 bass accordion chart layout

On the left, you can see a 96 bass layout, overlaid with a 120 bass layout. The chart on the right shows you which notes are played by each button.


All chords you can play on a 96 Bass Accordion

There are four columns of standard chords:

  • 16 major chords
  • 16 minor chords
  • 16 dominant 7th chords
  • 16 diminished 7th chords (same as minor 6th chords)

in all keys, however, combining chords and roots (or counter basses) you can get:

  • 14 Dominant 7th flat 5th chords,
  • 14 Dominant 7th flat 9th chords,
  • 14 Dominant 9th/11th chords,
  • 15 Dominant 9th chords,
  • 15 Major 7th/9th chords,
  • 15 minor(Major 9th) chords,
  • 15 minor 9th chords,
  • 16 minor 7th chords,
  • 16 Half-diminished chords,
  • 20 Major 6th chords,
  • 20 Major 7th chords. 

 


How to read the lists of chords

Here are some guidelines to help you read the following lists of chords and charts:

  • Flats and sharps are paired with their enharmonic equivalent chord, for example, C#Maj7 = DbMaj7
  • Chords that can be played are clickable and are colored in blue, for example, DMaj 
  • Missing chords are colored in gray and are crossed out by a horizontal line, for example, Bdim7. 
  • Duplicated chords are colored in light blue, for example, E#m7 = Fm7
  • Some chords can be played in two different ways: by combining a chord with a bass note or by combining a chord with a counter-bass button. For this reason, you’ll find two lists for the same group of chords, one for those that can be played combining a counter bass with a chord (“On Counter Bass” list) and one for those chords that can be played combining a bass note (“On Root” list).
  • The charts of those extended chords that can be built combining a chord with a counter bass or with a bass note, show both positions: counter basses are circled in blue, and basses are circled in green.
Cm7b5 chord position

You can play the root on the bass row or on the counter bass.

 


Standard chords

16 Major chords

Major chords are built with a Root (R), a major third (3rd), and a perfect fifth (5th).

 

On a 96 bass accordion you can play these Major chords:

 

 


16 Minor chords

Minor chords are built with a Root (R), a minor third (m3rd), and a perfect fifth (5th).

 

On a 96 bass accordion you can play these minor chords:

 

  • G#m = Abm 
  • C#m = Dbm
  • F#m = Gbm
  • Bm           
  • Em           
  • Am           
  • Dm           
  • Gm           
  • Cm           
  • Fm           
  • Bbm = A#m
  • Ebm = D#m
  • Abm = G#m
  • Dbm = C#m
  • Gbm = F#m
  • Cbm = Bm  

 


16 Dominant 7th (5th omitted) chords

Dominant 7th chords are Major chords with a minor 7th added.

Dominant 7th chords are built with a Root (R), a major third (3rd), a perfect fifth (5th) and a minor seventh (m7th).

The 7th chord buttons on the Stradella bass system play just the root, the 3rd, and the 7th. The 5th is omitted.

 

On a 96 bass accordion you can play these Dominant 7th chords:

 

  • G#7 = Ab7
  • C#7 = Db7
  • F#7 = Gb7
  • B7         
  • E7         
  • A7         
  • D7         
  • G7         
  • C7         
  • F7         
  • Bb7 = A#7
  • Eb7 = D#7
  • Ab7 = G#7
  • Db7 = C#7
  • Gb7 = F#7
  • Cb7 = B7  

 


16 Diminished 7th (5th omitted) chords

Diminished 7th chords are minor chords with a diminished 5th and a diminished 7th added.

They are built with a Root (R), a minor third (3rd), a diminished fifth (d5th), and a diminished 7th (d7th).

On the Stradella system, Diminished chord buttons play a diminished 7th instead of a diminished 5th, which is omitted.

 

On a 96 bass accordion you can play these Diminished 7th (5th omitted) chords:

 

same as

16 minor 6th (5th omitted) chords

Minor 6th chords are minor chords with a major 6th added.

They are built with a Root (R), a minor third (3rd), a perfect fifth (5th), and a major sixth (6th).

On the Stradella bass system, diminished 7th chords are also minor 6th chords because there’s no diminished 5th and a 6th interval is equal to a diminished 7th interval. Minor 6th chords and diminished 7th chords can be thought of as equivalent in the Stradella bass system.

 

On a 96 bass accordion you can play these minor 6th chords:

 

  • G#m6 = Abm6
  • C#m6 = Dbm6
  • F#m6 = Gbm6
  • Bm6             
  • Em6             
  • Am6             
  • Dm6             
  • Gm6             
  • Cm6             
  • Fm6             
  • Bbm6                
  • Ebm6                
  • Abm6 = G#m6 
  • Dbm6 = C#m6 
  • Gbm6 = F#m6  
  • Cbm6 = Bm6    

 


Combined Chords

14 Dominant 7th flat 5th chords

The Dominant 7th flat 5th chord (7b5) is a Dominant 7th chord with a flat 5th added.

It is built with a Root (R), a major third (3rd), a diminished fifth (d5th), and a minor seventh (m7th).

On the accordion, you can play a 7b5 chord by combining a Root with the Dominant 7th chord built on its flat 5th interval, for example, C + Gb7 = C7b5. C is the Root and Gb is the flat 5th of C.

 

On a 96 bass accordion you can play these Dominant 7th flat 5th chords:

 

On Counter Bass:

 

On Root:

  • G#7b5 = Ab7b5
  • C#7b5 = Db7b5
  • F#7b5 = Gb7b5
  • B7b5             
  • E7b5             
  • A7b5             
  • D7b5             
  • G7b5             
  • C7b5             
  • F7b5             
  • Bb7b5 = A#7b5
  • Eb7b5 = D#7b5

 


14 Dominant 7th flat 9th chords

The Dominant 7th flat 9th chord (7b9) is a dominant 7th chord with a minor 9th (same as a minor 2nd) added.

It is built with a Root (R), a major third (3rd), a perfect fifth (5th), a minor 7th ( m7th), and a minor ninth (m9th).

On the accordion, you can play a 7b9 chord by combining a Root and its major chord with the diminished chord built on its minor 7th interval, for example, C + CMaj + Bbdim  = C7b9.

 

On a 96 bass accordion you can play these Dominant 7th flat 9th chords:

 

 


14 Dominant 9th/11th chords

The Dominant 9th/11th chord is a dominant 7th chord with a major 9th (same as a 2nd) and an 11th (same as a 4th) added.

It is built with a Root (R), a major third (3rd), a perfect fifth (5th), a minor 7th ( m7th), a major ninth (9th), and an eleventh (11th).

On the accordion, you can play a Dominant 9th/11th chord by combining a Root and its major chord with the major chord built on its minor 7th interval, for example, C + CMaj + BbMaj  = C9/11.

The 11th is dissonant in major and dominant chords because the 11th and the major 3rd are adjacent tones, for example, C9/11 = C, E, G, Bb, D, F.

 

On a 96 bass accordion you can play these Dominant 9th/11th chords:

 

 


15 Dominant 9th chords

A Dominant 9th chord is a Dominant 7th chord with a Major 9th added.

It is built with a Root (R), a major third (3rd), a perfect fifth (5th), a minor seventh (m7th), and a major ninth (9th).

On the Stradella bass system, you can play a Dominant 9th chord by combining a Root and its major chord with the minor chord built on its 5th interval, for example, C + CMaj + Gm = C9.

 

On a 96 bass accordion you can play these Dominant 9th chords:

 

  • C#9 = Db9
  • F#9 = Gb9
  • B9         
  • E9         
  • A9         
  • D9         
  • G9         
  • C9         
  • F9         
  • Bb9 = A#9
  • Eb9 = D#9
  • Ab9 = G#9
  • Db9 = C#9 
  • Gb9 = F#9 
  • Cb9 = B9   

 


15 Major 7th/9th chords

The Major 7th/9th chord (Maj7/9) is a Major 7th chord with a major 9th added.

It is built with a Root (R), a major third (3rd), a perfect fifth (5th), a major seventh (7th), and a major ninth (9th).

On the accordion, you can play a Major 7th/9th chord by combining a Root and its Major chord with the Major chord built on the 5th interval from the Root, for example, C + CMaj + GMaj = CMaj7/9.

 

On a 96 bass accordion you can play these Major 7th/9th chords:

 

 


15 minor(Major 9th) chords

The minor(Major 9th) chord is a minor 7th chord with a major 9th added.

It is built with a Root (R), a minor third (m3rd), a perfect fifth (5th), a minor seventh (m7th), and a major ninth (9th).

On the accordion, you can play a minor(Major 9th) chord by combining a Root and its minor chord with the Major chord built on its 5th interval, for example, C + Cmin + GMaj = Cm(Maj9)

 

On a 96 bass accordion you can play these minor(Maj9) chords:

 

 


15 minor 9th chords

A minor 9th chord is a minor chord with a minor 7th and a major 9th added.

It is built with a Root (R), a minor third (m3rd), a perfect fifth (5th), a minor seventh (m7th), and a major ninth (9th).

On the Stradella bass system, you can play a minor 9th chord by combining a Root and its minor chord with the minor chord built on the 5th interval, for example, C + Cm + Gm = Cm9.

 

On a 96 bass accordion you can play these minor 9th chords:

 

  • C#m9 = Dbm9
  • F#m9 = Gbm9
  • Bm9             
  • Em9             
  • Am9             
  • Dm9             
  • Gm9             
  • Cm9             
  • Fm9             
  • Bbm9 = A#m9
  • Ebm9 = D#m9
  • Abm9 = G#m9
  • Dbm9 = C#m9
  • Gbm9 = F#m9
  • Cbm9 = Bm9  

 


16 minor 7th chords

A minor 7th chord is a minor chord with a minor 7th added.

It is built with a Root (R), a minor third (m3rd), a perfect fifth (5th), and a minor seventh (m7th).

On the Stradella bass system, you can play a minor 7th chord by combining a Root with the Major chord built on its minor 3rd interval, for example, C + EbMaj = Cm7.

 

On a 96 bass accordion you can play these minor 7th chords:

 

On Counter Bass:

  • E#m7 = Fm7  
  • A#m7 = Bbm7
  • D#m7 = Ebm7
  • G#m7 = Abm7
  • C#m7 = Dbm7
  • F#m7 = Gbm7
  • Bm7             
  • Em7             
  • Am7             
  • Dm7             
  • Gm7             
  • Cm7             
  • Fm7             
  • Bbm7 = A#m7 
  • Ebm7 = D#m7 

 

On Root:

  • G#m7 = Abm7
  • C#m7 = Dbm7
  • F#m7 = Gbm7
  • Bm7             
  • Em7             
  • Am7             
  • Dm7             
  • Gm7             
  • Cm7             
  • Fm7             
  • Bbm7 = A#m7 
  • Ebm7 = D#m7 
  • Abm7 = G#m7 

 


16 Half-diminished chords

The minor 7th flat 5th chord (half-diminished) is a minor chord with a flat 5th and a minor 7th added.

It is built with a Root (R), a minor third (m3rd), a diminished fifth (d5th), and a minor seventh (m7th).

On the accordion, you can play a Half-diminished chord by combining a Root with the minor chord built on its minor 3rd interval, for example, C + Ebm = Cm7b5

 

On a 96 bass accordion you can play these minor 7th flat 5th chords:

 

On Counter Bass:

 

On Root:

 


20 Major 6th chords

The Major 6th chord is a Major chord with a major 6th added.

It is built with a Root (R), a major third (3rd), a perfect fifth (5th), and a major sixth (6th).

On the accordion, you can play a Major 6th chord by combining a Root with the minor chord built on its 6th interval, for example, C + Am = C6.

 

On a 96 bass accordion you can play these Major 6th chords:

 

On Counter Bass:

  • B#6 = C6  
  • E#6 = F6  
  • A#6 = Bb6
  • D#6 = Eb6
  • G#6 = Ab6
  • C#6 = Db6
  • F#6 = Gb6
  • B6         
  • E6         
  • A6         
  • D6         
  • G6         

 

On Root:

  • B6         
  • E6         
  • A6         
  • D6         
  • G6         
  • C6         
  • F6         
  • Bb6 = A#6
  • Eb6 = D#6
  • Ab6 = G#6
  • Db6 = C#6
  • Gb6 = F#6
  • Cb6 = B6  

 


20 Major 7th chords

The Major 7th chord is a Major chord with a major 7th added.

It is built with a Root (R), a major third (3rd), a perfect fifth (5th), and a major seventh (7th).

On the accordion, you can play a Major 7th chord by combining a Root with the minor chord built on its 3rd interval, for example, C + Em = CMaj7.

 

On a 96 bass accordion you can play these Major 7th chords:

 

On Counter Bass:

 

On Root:

 

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