I'm starting a project for an audio switcher that's controlled by an arduino board. I've made some research, and it seems a multiplexer is what i need. The multiplexer i've found so far is a MC14053, a triple SPDT switch (the datasheet is attached below). But since i'm just a beginner i do not know if it will do the trick for an audio switch. As i'm just a beginner in both electronics and arduino, some guidance on this subject would be appreciated. And excuse my poor english, i'm from Venezuela. Hope you can help me, and thanks in advance !
Sometimes you can get switching-noise with digital switches, or you can get noise from a temporary invalid state during switching. If that happens, you might need to use some "tricks" such as adding another switch to "ground-out" the signal during switching-time (without grounding/shorting anything that shouldn't be grounded). The noise (if any) shouldn't be too bad, but with a hi-fi amplifier, a little switching noise can by distracting/annoying.
You also need to make sure that you don't get any DC leakage or "drift" when the signal-path is open because you'll get a "click" or "tick" when you close the switch. (That's true with mechanical switches too.)
Now i was working under the assumption that the switch's "Break before make" feature was providing a solution to that problem... Doesn't it?. In any case i shall follow your advice to make sure things go smoothly. The problem i am most afraid of is keeping the input signal quality intact, as matching the input/output impedances...
And if i use capacitors as filters on the inputs, would that get rid of DC noise?. Or you're talking about isolating the supply and control circuits from the audio input / output?
I will post an schematic for my project as soon as i can.