I'm low tech so maybe this is an easy one. My DirecTv remote is RC73. I'm trying to have it learn the code to control my Sony audio receiver. My setup is a projector for TV and the audio goes through the Sony receiver. My remote will control the DirecTv power and channels but not the audio. I've tried all the programming codes for Sony but no luck. Is this because of the way I'm setup? If the DirecTv remote won't contol the audio, I'm assuming I need a universal remote. If that's the case, I need one that will program through walls to reach the receiver which is contained in a media room, if anyone could recommend a remote for my situation. Hopefully I described this correctly.