Here's a modification using a SPDT reed relay to ground the amp input, rather than use the 10k resistor:
Edit: A 10k resistor between the Input and ground would be useful, to shunt away any DC voltage that might arise from leakage of the output capacitor in the sample-player.
Two SPDT relays can be driven by the one comparator to handle stereo. If the Supply voltage is a regulated 9V or more you may get away with connecting their coils in series to minimise current consumption.
Edit: A 10k resistor between the Input and ground would be useful, to shunt away any DC voltage that might arise from leakage of the output capacitor in the sample-player.
Two SPDT relays can be driven by the one comparator to handle stereo. If the Supply voltage is a regulated 9V or more you may get away with connecting their coils in series to minimise current consumption.
Last edited: