Made this the other day with 4 other monster players via a web jam.
It came out GREAT!
First a guy builds a template via his DAW and posts it then other players download that, add tracks and upload it again for the next guy. All stages of the recording are accessible on the website so if someone adds something you can step back and use the last template version to do your addition.
https://m.soundcloud.com/riffraff12571/ ... al-af-5-11