Assertion: accordion's button | /r/CapableOf | play same note
Facets:
Source sentences:
text: Buttons on chromatic accordions play the same note on the push/pull direction of the bellows where buttons on diatonic accordions play two different notes depending on the bellows direction.
text: The garmons can be of two major classes: unisonoric, meaning that each button plays the same note or chord when the bellows is being expanded as it does when compressed, and bisonoric, in which the note depends on the direction of the bellowswork.