does anyone know how to resolve the horrible audio screeh on the hd channels?
Sounds like you got a bad receiver. I had the same problem when I purchased one from Directv(made in China). Both OTA and Directv HD had audio problems. I called Directv. The response was that I had to schedule another "install" date. The installer would not be able to supply another unit for two months. Called customer retention and got a credit for the purchase of a new unit from either Best Buy or Circuit City. Purchased a new unit from CC(made in Mexico). Works great. No complaints.