Hi! Have encountered several systems of defining musical range, which is of course very relevant in the harp world, with the different sized instruments with different ranges. One of the best I have come across, and apologies, I can’t recall where it was, is this one:
It’s based on the piano-the lowest note, an A, is designated A1, the next A#1 or Bb1, then B1, C1, up to G#1 or Ab1. Then the next chromatic octave goes A2 to G#2, next A3 to G#3, and so on right to the top note. Middle C is C4.
For playing songs, in my experience, a minimum range is C3-A6, while C3-C6 or D6 is better. This gives adequate bass, and such a harp should still be lap-harp size.
What do others think?