Assertion: clavichord's key | /r/HasProperty | twisted
Facets:
Source sentences:
text: The term "fretted" was applied to those clavichords which, instead of being provided with a string or set of strings in unison for each note, had one set of strings acting for three or four notes, the arms of the keys being twisted in order to bring the contact of the tangent into the acoustically correct position under the string.