BluesBox ( pitch bending accordion )

[96Bass]

 

[96Bass]

This video explains how they achieve the pitch bending. Starts at 33:20

 

[Perogie]

My buddy has one of those tiger combocordions from the 70s(?) and it has that pitch bend feature if you twist the bellows. It's kinda cool but it has a weird register or two where it plays 5th etc

I wonder if it's the same concept