On the Stradella bass system, diminished 7th chords are also minor 6th chords
AKA: A# diminished seventh, A#°, A#dim, A#dim7, A#dim7th, A#dim/6, A#dim(add6)
Green bass pattern: A#dim7(omit5) = A#m6(omit5)
Blue counter bass pattern: A#dim7
Notes:
A#, C#, E, G
A#dim button plays:
A#, C#, G (no E)
Intervals:
R, m3°, m5°, dim7°
Dim buttons play:
R, m3°, dim7° (no 5°)
Left hand:
Green bass pattern:
A#dim7(omit5), same as A#m6(omit5)
A# + A#dim
(B♭ + B♭dim)
Blue counter bass pattern: A#dim7
A# + Edim
(B♭ + F♭dim)
Fingering:
4 + 2