Assertion: accordion's button | /r/HasProperty | arranged in a circle of fifths
Facets:
Source sentences:
text: The Stradella Bass System (sometimes called standard bass) is a buttonboard layout equipped on the bass side of many accordions, which uses columns of buttons arranged in a circle of fifths; this places the principal major chords of a key (I, IV and V) in three adjacent columns.
text: Mariano Dallape developed a system of bass buttons arranged in the Circle of Fifths (see Accordion Anatomy) with bass and counterbass rows and four rows of chords.
text: It uses columns of buttons arranged in a circle of fifths.