And since one expects maps to have things like a scale and a compass rose (if applicable), I hacked together what I'll call a Scale Rose for this unusual map. The way it's tuned, there's a set of overlapping diatonic scales available (one diatonic scale on a piano for instance is just the white keys), so it is important to know what keys one can play in. If this one is in a jam session and somebody with a fiddle or guitar starts up a tune in B major or something odd like that, I'd need to either stay silent, or cleverly play all the appropriate notes that I could and omit the ones missing from the tuning map. Theoretically, if you are in a group and skip notes, nobody'll notice. In practice, t'would be like doing that on a banjo or bagpipe - as a loud instrument, you're gonna be noticeable.

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... and I even kept the palette tight enough to leave it in .gif :-). That's a game I play - setting myself as many constraints as I can ...