I am trying to refine the design of an audio switch that I built a while ago. Since this is used to connect two inputs (two sound cards) to five possible outputs (speakers, tv, etc) with stereo audio plugs, I am dealing with three circuits. Since finding triple-throw, triple-pole switches is difficult, I was forced to wire the ground directly to all possible outputs (the ground isn't switched) which sometimes causes audible interference. I was therefore wondering, is there a way to control more circuits using simple switches? What if somebody needs to switch four circuits at a time? Or five?
I am a software dev and just beginning with hardware tinkering so please excuse this being so elementary.