Hey all: I have an audio signal from an old portable CD player that on max volume outputs about 1-1.2V as shown when attached an oscilloscope. I want to feed this signal into a PIC microcontroller, but I hear you need to amplify and shift the signal into the 0V to +5V region for it to work correctly. I want to use the PIC to pulse modulate the audio signal. Does anyone know of any good zero-span circuits or if I even need one? Thanks!