Thank you very much steve!
The AC signal part is what I was trying to figure out.
Oh and I don't have a schematic. This is just something I have been reading about and wasn't sure about the AC signal part.
Hope I can explain this well enough...
A capacitor will block DC in a circuit, but allow AC. Right?
If I have a simple FM transmitter circuit powered by a 9V battery for example, that uses a small mic (like the ones sold at Radio Shack), the 'waveform' that is created from speaking into...