This is about the production of Star Trek TNG episode "11001001".
Riker fires up a holodeck program to recreate a jazz club. On stage there are 3 musicians. At one point in the episode, he briefly picks up a trombone.
My question(s): were the actors actually musicians? Is the music we hear actually from the performance we see i.e. filmed "live"? And is Jonathan Frakes really playing that trombone?
The thinking behind my question:
Capturing and utilizing the whole performance would create a natural feel and flow to the scene - it does seem as though that is what was done, but appearances can be deceiving.
The musicians could be real musicians, even if the music we hear was recorded separately due to the difficulties of working with "live" sound
The "musicians" could simply be actors and the music was performed by someone else entirely - it's all "movie"(TV) magic.