well i got a power cable, does anyone know what adapter i need to go from the microphone cable (the three pin thing), to the omni i/o input which is just like the input of a guitar cable.
You want a standard XLR-XLR cable (commonly refered to as a mic cable!) to plug your mic into the MIC input on the Omni. That's what it's there for Don't plug it into the 1/4" input, it won't work (or it might work but sound like cr*p)
BTW - What mic to you have? Make sure if it needs phantom power that you turn it on AFTER you plug your mic in. I have the Delta 44 and I've been very happy with it. Good luck!