What is an ensemble and who is an orchestra/choir representative?

What is an ensemble and who is an orchestra/choir representative?

Orchestras/Choirs are groups starting from 10 contributing musicians/singers who often perform and record productions in a consistent formation and under a permanent, proper name.

 
Orchestra/choir representatives are persons authorised by the orchestra/choir who register the contributions on behalf of all members of the orchestra/choir. This significantly reduces the number of individual registrations as well as the processing operations at GVL.