The musician is feeling given instrument — emotion made audible through practiced hands. Dream-musicians concern your expressive function: the instrument mastered or squeaking, the song inside seeking its performance.
Positive Resonance
Feeling made audible, practice become fluency, the song released
Shadow Aspect
The instrument unpracticed at the concert, the song kept inside
Nuances
Playing fluently: expression through mastered means
On stage unable to play: expression's classic failure dream
Jamming with others: feeling harmonized socially
The unplayed instrument: the song waiting in the case