Fiddle: Scales for a Country Fill
Pick a root, pick a type — the map plus the fill it feeds.
Pick a root and one of 24 types and see it as it lies on this chair's fingerboard, roots marked throughout. Three of these carry most of the repertoire; the rest are for the song nobody warned you about.
The fiddle takes the intro hook and the turnaround answer more often than any other chair, so its scale work is intonation work — no frets to correct you, and a bow that exposes every approximation.
A fill is not a scale played straight through. It is a handful of notes pulled from one, timed to land before the vocal comes back in — which is what a scale map is actually for.