Actually a piano accordion, but it's been refreshing learning to play the bass buttons. They increment in 5ths along the main axis, but with an offset row also

Actually a piano accordion, but it's been refreshing learning to play the bass buttons. They increment in 5ths along the main axis, but with an offset row also giving quick access to a major 3rd up or semitone down. My primary instrument is piano so it's definitely involved rewiring my concept of which notes are 'close' and 'far' to match the circle of fifths. Until now I never noticed how in addition to the usual cadences, many tunes have further rising/falling sequences of 5ths in the bass.