First i'll explain the setup that I had. My amps go into a Mackie Mix5 and I had it plugged into my Soundblaster Live sound card which worked great for playing through my 5.1 system. The Soundblaster has recording software and gave me sound for my TV and ipod which is where my backing tracks are. This worked great until my computer quit. So in order to get away from relying on sound cards, I bought a complete 5.1 system. It has RCA in but no 1/4 inch in. I used 2 1/4 male - RCA female adapters on the mixer and connected to the receiver. My ipod is plugged into the mixer. Now the problem. My guitar signal is delayed by a fraction of a second. Enough to throw off my playing. When I plugged my headphones into the mixer it was fine, so I tried a 1/4 headphone extension and an adapter to RCA but the same thing happens. Is there something I can do about this? I really like having my guitar and backing tracks coming out of the same place.