Charango Tuner

Five reference tones, GCEAE — check the twin E first, because a pair that disagrees an octave apart throws off every rasgueo built on top of it.

Tuner controls

The two E courses are the fastest sanity check on this instrument: play them together and listen for a clean octave, not a beat. If they waver against each other, start there before touching anything else — the other three courses will fall into place once the twins agree.