From CCRMA Wiki
Please fill out your equipment in the following list:
We are going to make 4 instrumental groups with one analog mixer each. From each mixer 2-channels are going to be sent to the main mixer, and those 8 channels are going to be streamed. We are looking for volunteers to be in charge of each group, if you want to do that let us know.
Everyone that is using electronics or laptops is responsible to for their own cables to get into the mixer, i.e., you need to provide 1/4inch output from your setup (mono or stereo). Please also make sure that your signal isn't noisy.