This is a bit tricky but I will try. Since you are the Artist and it will be your recordings that may be used from a music library I might go for that and forgo the Music Publisher.

Or you can require a clause in the Publishing Contract(s) that allows you to exclude the publisher from any Music Library royalities and also not allow a music library to pitch to an artist but only use your original recordings in any placements.

The Publisher would not have any rights anyway to your Sound Recordings so you may be able to work it all out as long as everyone agrees and it is put in writing in the agreements.

When you sign a Publishing Contract the publisher owns the copyright but you can keep some rights, you just have to spell it out. Good luck!

Ray E. Strode