Using one of my "spare" RC23 Directv remotes on my main TV (den). Got my Sharp Aquos programmed with no problem. However, when I tried all codes for the Sony DAV-DX375 surround sound, could get none to work the volume. I did get a couple of codes to turn the thing on-off but not the volume. The old, physically worn-out RC23 did it (still does) just fine but I can't remember how I programmed it a few years ago. It seems like I pointed the RC23 and the Sony remote at each other and then did "something". But I could be wrong. Any suggestions...I've searched the internet to no avail? BTW, while I'm on a roll, the only way I can get sound out is by having the DX375 in VCR mode...is this common?