Replacing a FET to avoid the body diode (audio switching)
If the signal levels are high enough to tolerate the additional voltage drop of a Schottky diode (say 0.35 Volts), then the following change should solve the issue of reverse conduction:







simulate this circuit &ndash; Schematic created using CircuitLab

The Schottky diode indicated, Rohm Semi RB531S-30, has a 350 mV forward voltage and fast recovery time. It is available in single units for under US$0.50 per unit from DigiKey and others.

Alternatively, fast recovery, small-signal Schottky diodes with even lower voltage drop, down to 200 millivolts or less, are available as well.