A, Held by the Melody

All 54 qualities on the root A, across 10 families, drawn for this instrument. A son or a ranchera will use three or four of them; the rest are here for the bolero that reaches further.

In the melody section this instrument is the melody section's written line — several players bowing one part together, so intonation is a group problem before it is anybody's solo. A chord on a bowed neck is really a choice of double stops drawn from these tones, plus the arpeggio a bow can walk through the rest — and a section playing in unison has to agree on which one, because two answers at once is a chord nobody wrote.