Assertion: concertina | /r/HasProperty | finger
Facets:
Source sentences:
text: If you are playing "block chords"—all notes sounding simultaneously—there must always be a total cessation of sound, and when all the fingers leave all the buttons the pressure holding the concertina strap against the back of the hand is removed, which may allow the concertina to slip or wobble slightly, reducing control because there are no fingers left lightly touching a button-top to "keep position.