A co-publishing agreement means that while the music publisher has ownership in the copyright and administers its exploitation, another publisher (possibly a songwriter’s own company) controls the other piece of the publisher’s share of ownership. This type of agreement often happens when established songwriters who have a lot of power within the industry establish their own publishing entity and enter in an agreement with another publisher.

You Can’t Have Good Music Without Percussion
Percussion instruments are very old and have quite a history. Often used in folk music, these instruments add variety and a rural charm to music.