Bandoneon - Learning C major with right hand opening

C Major notes learning tutorial for Bandoneon application. This is the right hand keyboard with the opening bellows.
Notes on the 4th octave. C D E F G A B C
Download Bandoneon app:
apps.apple.com...

[@austinqin5462]

What APP is this ?

[@burak_sendag]

"Bandoneon" app on the Apple Appstore for iPhone and iPad devices