Here's a little idea I came up with which should be pretty fun to do with the Audio community.
I made this short pad track (Tempo = 135 and Signature 4/4)
Now the next composer should try to add something to this but there's only 1 rule;
you can only change/add 1 thing! so if you want to add an instrument like for instance a bass you can't add any other instruments to the track. You can also continue the track and make it longer or have a key change maybe even a genre change :P
Once that person is done with his/her part he/she uploads the track again with his/her addition and the next composer can add something
Make sure the file stays in .WAV for best quality
Let's see what we can come up with :D