[Deeter]

I bought one of these and all the audio equipment and the laptop get plugged into it:
http://www.guitarcenter.com/Furman-M...99-i1389441.gc

I also bought one of these and it goes between the soundcard out on the laptop and the mixer:
http://www.guitarcenter.com/Rolls-HE...47-i1124895.gc

No hum- ever, now.