I have seen some schematics that deals with audio inputs, with this kind of circuit to DC bias a signal. The signal enters on the left side of C and gets out on the right side of C and goes to the amplifier.
But this is the problem. What prevents the signal going up R1 to the power supply and interfering on other parts of the circuit?
And if I have left and right channel I will have other pair of resistor for DC offset of the right channel and as R1 of both channels are connected to V+ and R2 of both channels are connected to ground, if a signal could go to the power supply it could reach the other channel.