| Answer | Crossword Clue |
|---|---|
| register | A sliding device controlling a set of organ pipes that share a tonal quality |
| registers | A sliding device controlling a set of organ pipes that share a tonal quality |
| stopt | set of organ pipes producing tones of the same quality or the knobs controlling these |
| stop | set of organ pipes producing tones of the same quality or the knobs controlling these |
