You check when the 22-pin mute circuit voltage drops below 1.5v (turn off the amplifier below 1.5v) and the current shock sound is in front of or behind this.
You check when the 22-pin mute circuit voltage drops below 1.5v (turn off the amplifier below 1.5v) and the current shock sound is in front of or behind this. Adjust the mute delay capacitor to turn off the amplifier early.