v.17

Leave F3 and F4 as DSU.

1. Tune F3F4 as a clean octave, remembering that F3-A3 ~ 7 bps.
2. Play F3 and F4, 3 seconds each.
3. Play F3 and F4 3x’s fortissimo.
4. Play F3 and F4, 3 seconds each.
5. Indicate whether your F3-F4 octave is small, medium, or large.
6. Play, 3 seconds each:
   – C#3-F3, C#3-F4
   – F3-G#3, G#3-F4
   – F3-F4, as an octave