Humming/Buzzing sound coming through speakers
 

When I hook up my computer I get a buzzing sound coming through my speakers. If I disconnect and run straight through the mixer/cd player it plays fine no feedback at all. Any suggestions on how to fix this?

Buzzing and feedback are two different things.

Is this a laptop?

Jim :g

My guess is that it is a laptop. Unplug the power going to the laptop and run it off battery, if this fixes your problem then get one of these.

http://www.amazon.com/Unknown-3-PRON...5590936&sr=8-1

You can find these at any store almost, Walmart, Home Depot, Lowes, Target, Radioshack, etc.

This will fix it if the noise is from a laptop plugged into the wall. My guess is this is it.

Bryan

Basically what you are experiencing is called a Floating Ground. You don't mention an amp so I suspect you are using amplified speakers and this is usually the cause. Your computer is not plugged into the same circuit that the speakers are and the building ground is not correct so this causes a difference in the ground.
Quick fix is get a two prong to three prong adaptor from any store that sells electrical equipment and parts. Use this plug to plug in your computer.
Since you don't have this problem with the mixer/cd player set up try plugging in the computer to the same circuit you use on it. If you don't have enough plugs on the circuit, use a Surge protected extension cord to plug them all into.