Assertion: harpsichord's key | /r/CapableOf | appear as d–g–b
Facets:
value: visually
type: MANNER
Source sentences:
text: On orthodox keyboards this would be an impossible stretch for most players, but as on the Viennese bass octave it would have been easy to play, with the fingers depressing keys that visually appeared as D–G–B (see diagram above).