Sorry to reincarnate this thread, but I finally had some time to do a
bit of searching on using a FET to mute audio. I found this page with
a bit of searching:
http://www.pic101.com/audiosw/index.html

The FET circuit seems simple enough to implement, but I've seen some
chatter on a forum that this circuit won't attenuate enough with a low
impedance. My source is low impedance, but it's also balanced.

So...I'm a little confused if I could make this work. Would I have to
use two of these circuits (one on each of the mic lines)? Would it
make sense to power my circuit off an isolate DC/DC converter to avoid
ground hum issues? I think it's safe to assume that my circuit will be
off a different power source (and possibly different ground) from the
one that the mic is connected to.

I'm fairly confused about this.

Josh
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