Thanks for the suggestion. The data sheet for this chip suggests the gain is set to a minimum of 20. Is there a way to ensure that the gain is actually reduced since I only want to go from 0 to 1 Volt. If not, the accuracy controlling it with PWM will be very low since I will be working with only a 50 mV voltage from the PWM output to get to 1V.
Perhaps I have misunderstood how to wire up the audio amp.
Thanks,
Nick