[Bruce Edwards]

If the carpet has a backing of felt it is not that hard to peel some off. Use a razor blade or small blade knife to trim the backing. Then just peel it off. Any small bits that are left behind will not bother anything. Or you could also cut some small slits in the rug that run the same way as the grain of the rug. If you keep them small you will not be able to see them and they will let the sound through. Just a thought.