Hello everyone. I was trying to listen to some MP3s, but I noticed that regardless of what surround sound mode my denon receiver was set to, all speakers would still carry just one sound and the subwoofer wouldn't work at all. Everything is fine during movies and what not. Whenever I connect my MP3 player to a 2.1 system, the subwoofer is working in that system just fine. Also, I've tried connecting my MP3 player to the denon receiver using a 3.5mm to RCA converter, and I've tried loading the music right on to my blu ray player, but to no avail. I was doing some research and I think it said somewhere that MP3s don't support anything greater than 2.1? Is that true? I was thinking of converting everything to FLAC file and then using my HT system. Is there any solution to this? Thanks.