A couple of days ago I pulled out a CD of a band I used to be in and threw it in the car. Last night on the way home from work I put it in and listened to it- this particular CD had the results from the our last recording session that we never finished. One of those "unfinished" songs is really cool, and I'd totally forgotten about it- the music is around 80-90% mine and the lyrics are less than 10% mine. (it's the only unfinished song with scratch vocals- I don't remember any of the lyrics from the other two) As I listened to this song I thought the band I'm in now could really do something cool with it. I haven't talked to the singer/guitarist of the old band since early spring of '98 for a number of reasons- one of which being he decided to stop playing music in a live setting. The ethical question is can I, in good conscience, use that song? The lyrics aren't mine, but I had a major hand in the music, it's never been released and if my current band were to record and release it I'd have the guy's name credited. How does this situation differ from doing an ordinary cover?