So I have a Harmon/Kardon HK3490 and it works just fine. However I just bought a new Samsung Tv PN51E450. I mostly just use my xbox to watch movies and play games and is hooked up to my Tv via HDMI. So I run a digital audio cable from Tv to receiver and got no sound. Then tried Xbox to receiver and same thing. I did my research and found that my receiver only plays 2.1 and will not convert 5.1 to 2.1 sound. So I bought myself a digital audio to analog audio converter that converts 5.1 to 2.1. Now I can't get any sound out of any of the normal inputs "vid 1, vid 2, vid 3, CD, TAPE. The only input I can use is the "main in" which is something to do with external amps or something. It would be fine except I cannot change the volume. It only plays LOUD. Not even if I turn the sound to -80 which I would assume mute it. I can't use the Tv volume to turn it down as it's going through "external speaker" and my receiver wont turn it down. I've tried going audio from Tv to receiver and not xbox to receiver and same issue. I am usually good at this stuff but its got me stumped. So my question is why am I not able to change my volume at all?