I think you might be referring to the Om Mani Padme Hum chant. This one is on a CD of 20 chants by Thomas Ashley Ferrand and is available through Sounds True. I believe there is a musical background however. There are many CDs out with this chant on them at Amazon.com, ARE Bookstore and Sounds true, but I think you'll find they have music in them as well. An exception would possibly be Georgian chants. The above sites let you listen before you buy... unless you have an antique computer like ours. Good hunting.
