This object can only be interacted with when you have one of the listed Related Quests.
This object can only be harvested, or possibly even seen, when you have one of the listed Related Quests.
Yellow Music Pearls are the Quarter Rests.
Red Music Pearls are Eighth Rests.
Blue Music Pearls are quarter notes. (These can be clicked to play the single note they are set to. Red and Yellow does not do this)
You can ask the Magical Gramophone to "Replay" the song as many times as you need, and if you mess it up beyond recognition you can "Reset" the challenge (this re-scrambles the "wrong" notes).
Clicking on a Blue Music Pearl will play the note that pearl is currently set to.
Use Remove Note (alt-1) to remove the "wrong" note(s). Use the correct note skill and place it as close to exactly where the removed pearl was. When you have completed your change(s), click the Magical Gramophone and tell it to "Replay". If your changes are correct the challenge completes.