Disconnecting PWM10 doesn't seem to make any difference to any of the effects. Why are there two different resistor values connected to PWM9 and PWM10, and what is the theory behind its operation?
thanks for that. I have a better idea now, but I still don't comprehend something. Is the frequency of the sample signal replicated in the duty cycle?, and if so then how is the amplitude replicated?.
In software, what does is needed to modify the amplidtude, and what is needed to modify the frequency?
Oh I think I get it now. The amplitude is reflected in the duty cycle and the frequency is reflected in the period. Is that correct?