Vihuela: Scales for the Armonía
Twelve roots against 24 types, mapped for one instrument and read as armonía work.
Pick a root and one of 24 types and see it as it lies on this fretboard, roots marked throughout. A few carry most of the repertoire; the rest are for the arrangement that goes somewhere else.
The armonía is not a soloing section, so a scale here is diagnostic rather than melodic: it is how a player finds which tones a grip is actually putting in the air on a neck whose octaves do not run in order.
A written line is not a scale played straight through. It is a handful of notes taken out of one and timed to land before the sung phrase comes back — which is what a map like this is actually for.