/diy/ - Do It Yourself

>>1177114

reading your confused posts gives me a headache, but i can see right away from your schematic that you've wired the mic op-amp to have a gain of 1, which is nuts coz a typical mic only produces about a millivolt. you want a gain of 100 to 1000.
if the mic is an electret type it also needs a DC bias to make it work. see pic

as for the music signal, the 500K pot is really attenuating your signal. try 1k-5K instead.

as for where exactly your ground is, do trial and error. there are only 4 pins, so you should be able to find it in less than 136,854 tries.

>>489136
Quite true. This is a typical setup with such mics and the power source is in the PC already.