I'm wondering if you can help me with how I might go about setting up the following simple circuit: My ultimate goal is to create a small device with inputs of 2x 3mm Jack for audio and an output of a 3mm Jack for audio so that I can plug in 2 audio inputs and choose which one is played through my speakers. Basically all that I need is a switch to choose between the two inputs, which is simple enough except for 3mm Jacks having 2 cables each. This complicates things slightly and effectively the problem becomes: how can I use one switch act as a normal switch on 2 circuits simultaneously (and without a power-source of it's own). I have not tried building this yet, it's all just theoretical - trying to find out how I'd go about it. Any advice you can give, I would greatly appreciate. I've forgotten all of what little I knew about circuitry from school. Paul