Board Thread:Questions and Answers/@comment-71.204.55.237-20130709001358/@comment-4565782-20130710041255

I think that in most cases the mixers and singers are usually friends (or just somehow become friends) or just have connections (for example Singer A is friends with Mixer B and Singer C. A can then get B to mix for C).

I wouldn't be surprised if there was a forum out there with people offering to mix for practice.