I ended up getting the cable that has 2 TRS jacks and 2 RCAs on the other end, with the corresponding orange and grey colors on the TRS ends. The Ac select is on 115 as it came, the lights are on, theres no loose ends, and all volumes are turned up. I can hear the humm coming out of the monitors but i dont hear the music being played back. also, with the interface hooked up, that volume selection in the bottom right corner is grey, and i cant mess with it.