Assertion: concertina's note | /r/HasProperty | cof the natural scale
Facets:
Source sentences:
text: The Red Keys like the Red Strings of a Harp are used for the key note (c) of the natural scale, and although this is a mere arbitrary rule (indeed the better kind of instruments have the keys all alike) it is remarkable that in the old Latin Nemna, a method of writing music older than the Gregorian chants [p.10]