Accordion Flashcards- Bass Set Specifically created for the stradella bass system widely used in most accordions. These flashcards help the student learn the first buttons of the accordion. This set is ideal for the student who is mastering the first 54 buttons on any 6 row accordion (72,96, or 120 bass). General knowledge cards included as well. Improve sight reading speed. Packaged in resealable clear bag for convenient storage.