Studios don't define royalties in music, unlike video. The royalties for music are well defined on a global? or at least country wide scale and performers don't really get to choose whether or not they participate. Writers get a chunk and owners get a chunk. Owners can be the performer, but many songs are classified as "work for hire" and the IP is owned by someone other then the performer.

https://www.ascap.com/help/royalties-and-payment/payment/roy...