If you do that be sure to use ultrasonic frequency for the PWM (so it doesn't breakthrough to audio) and don't expect great linearity from LDRs, they typically introduce audio disotortion higher than most good amps.
If you do that be sure to use ultrasonic frequency for the PWM (so it doesn't breakthrough to audio) and don't expect great linearity from LDRs, they typically introduce audio disotortion higher than most good amps.