Assertion: accordion's type | /r/HasProperty | a power button
Facets:
Source sentences:
text: As well, digital accordions have other types of buttons or switches: a power button, a volume knob or buttons, program and sound buttons, buttons for selecting effect unit settings (for reverb and other effects), other instrument sound buttons (organ, piano, guitar, etc.), and buttons and keys for notes (on some instruments these are velocity-sensitive).