dc operated volume control

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Here is my preamp,Have not built it yet.My idea is to use one pot to control 2 channels,First op amp is unity gain to isolate the source second op amp is for gain and third is buffer.The fets provide a variable resistence to ground after the 1 k resistor before the gain circuit.I would like anyones input as to if its a good circuit

:bigeyes:
 

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