I figure there's clean way to kill this pop without changing (much) the impedance or voltage going to the electret mic. Furthermore, that fix involves a 3 lead mic, where mine is 2. The fix seems intuitive but it involves the internal circuit, which is beyond the scope of the mute button it's inside my sound card and I'll be damned if I have to get in there to fix this.
I've combed this board for fixes and and can't find one. Upon taking it apart it appears that its mute circuit is really simple and therein may lie the issue. I've got a PC microphone that fires off a loud pop when muted.
