I am trying to get a nice sounding varying PWM to DAC, and intend to use a Sallen Key as part of an active low pass filter.
I set the Fast PWM at a max of 255 (WGM1[0-3] = 5) and set/clear OC1A upon comparing with OCR1A
I also update the value of OCR1A in 64 distinct steps, changing those steps around 15'000 times a second to create a specific sinusoidal shape.
As the chip works at 16 Mega Hertz, does this mean that one cycle of PWM is
16'000'000/256= 62.5 Kilo Hertz? If not, what is its resolution