For another game, but I figure why not ask here.
I've got a musician who gains power from performing.
One of his schticks is that he can ask the primal aspect of music for a small favor, and then has to offer a service in return.
Since performing isn't much of a service (it directly benefits him), what might the Concept of Music like to have done?
Maybe writing out sheet music? Sharing youtube videos? Volunteering at indie concerts?
I'll take a stab...
1: Maybe the Primal aspect just want his own music to be heard and asks that the musicial play one of his songs.
2: Perhaps the aspect hates country music and demands the player sabotage a country artists performance.
Or maybe draw upon Rock & Roll lore.
3: The aspect demands that only green M&M's be presented as a offering. Maybe that is what Van Halen was doing back in the day. (If you are familiar with that legend)
Teach someone how to play. That costs time, but also expands the reach of music in a real and permanent way.
I like it. Maybe offer free tutoring sessions. Could have an NPC student as a plot-hook even.