| Answer | Crossword Clue |
|---|---|
| key | system of related musical tones |
| keyed | system of related musical tones |
| keys | system of related musical tones |
| tonality | a system of tones |
| tonalities | TONALITY, a system of tones |
| octachord | an instrument of eight strings; a system of eight tones |
| octachords | OCTACHORD, an instrument of eight strings; a system of eight tones |
