Arrow Up/Right: Next Harmonic
Arrow Down/Left: Previous Harmonic
Space: Toggle Note/Chord Mode
Enter: Open Harmonic Series Modal
1-0: Select Harmonics 1-10
QWERTY: Select Harmonics 11-16
ASDFGHJ: Select Harmonic Series 0, 2, 1, 12, 23, 13, 123
ZXCVBNM: Select Harmonic Series F0, F2, F1, F12, F23, F13, F123