I'd like to use this AGC circuit to mix some CCTV mic's together. They have a built in powered pre-amp next to the condensor mic module, which is powered with 12v dc and the output signal is 1v pp. Does it matter whether the P1 pot is linear or log? I want to take the output from P1 for setting the master volume level, then split that into 3 or 4 mono feeds, each with seperate pots for matching what I feed each signal into. I can then use P1 as a master volume control to set the maximum output levels for the other audio feeds split off from there. Each seperate audio feed after P1 will also have it's own pot, to match the sensitivity of each device I feed the signal into. I'd also like to power this AGC amplifier using the same low noise 12v dc mains power supply that I will be using for the CCTV mics.