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The circuit on the upper right side of page 3 doesn't appear it could work. The circuit on the left hand side has a resistor to the base and probably would. Also, a .02 seems way too small to couple audio to the base of the transistor. If it were a mosfet it would be one thing but a transistor base isn't that high an impedance. I would go with the circuit showing the resistor to the base of the transistor and increase the coupling cap to at least a .1
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