It's a shame that there are so many complaints about copyright infringement, so much of this music would be essentially lost except to serious collectors if everyone stopped posting sound files. I've heard all of the arguments for and against posting sound files, but it is still my opinion that the positives for posting them far outweigh the negatives in spite of the copyright issues some bring up. One of my old bands 45 would likely be rarely heard except for it's sound file being on the internet, that's why the drummer and myself told the site owner that we wanted him to post the files.
Clyde