You create a band, with up to 16 players of various instruments, appropriately equipped to play any sheet music used in the casting of the spell. The band members may resemble any race and be dressed in whatever attire you specify. Similarly, their talent and skill may also be determined by the caster (should they desire poor musicianship).
The band plays music at your direction, or the direction of another designated as the conductor who holds the tuning fork and sheet music once the spell has been cast. The illusory band is obviously spectral and illusory: they are intangible and should rotten fruit be thrown at them, will pass through unharmed (though not without raising some ire in their spectral hearts). The band can interact and respond to the audience at the discretion of the conductor.
The conductor may actively lead the band as they play their music, though as it is magically performed, the conductor's presence is ultimately unnecessary and the band will play the music regardless.
Subsequent castings of this spell in the same area may add more sections to the band, up to a total of 64 members.
* - ((a tuning fork to use as a conductor's baton, sheet music for the band) )