Originally posted by Nick Batzdorf:
I\'ve seen questions like this come up before, and they really point out how bizarre the legal arrangement is with sample libraries. (Sorry to step in the poop again.)
Let\'s pretend that this composer wants to hire you as a keyboard player to play on his album. Does it make any sense that you couldn\'t use your sample libraries? Of course not! Why would a keyboard player invest in them if he/she couldn\'t then use them?
And what the hell difference does it make whether you\'re credited as co-composer, keyboard player, or gynecologist? Or who wrote the music? Where in the agreement does it say that only composers may use the library? Talk about a small market! That would rule out all covers, of course, and no way could you play classical music that isn\'t in the public domain without buying the sample library for each piece.
Getting back to your situation, people hire other people to do mock-ups all the time. There\'s nothing sleazy about it at all. It would be sleazy and probably illegal if he wanted to rent your libraries from you, but how can anyone complain if he\'s hiring you to work on his project. That would be ludicrous.
Guitarists get hired because of their guitar sounds, drummers can get gigs because of their cymbals...and so on. Your libraries come with you.