A while back I did a post on Marc Angeles. in LA who had a YouTube video that had the video track shutdown because Marc had used some copyrighted audio (Marc has since replaced the track with some non-copyrighted music). J Miller raised the question, "how do you find legal music for videos"? Good question.
YouTube has some automatic algorithm that is able to identify copyrighted audio. Don't ask me how it works. I first encountered it a couple of years ago when I did a YouTube video of my grandson's first steps and used Fat's Domino's 60's rock tune, "I'm walkin" as the audio track. BAM, the video was disabled within hours. I got the message! I see from Marc's video that now YouTube a little more sophisticated, they just disable the audio track and flags it as a copyright violation.
JMiller says he tried to get permission to use some copyrighted work, and it was a hassle, and he couldn't get permission. Ya, I can believe it. The big name music studios are not interested in giving you permission to use their audio. They are paranoid about people stealing it! The way do find legal music is to look for Creative Commons music or sites that will license you music for you video or tour.
This page lays out advice for finding legal music and lists a bunch of sources for creative commons music. Another approach is to Google "creative commons music" and you'd find tons of creative commons and public domain music.
Also, here are site's recommended by readers for licensing music legally.
Everyone feel free to share you favorite public domain, creative commons music source.