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Posted by Ralph on March 17, 2017 at 11:48:52:
You won't be doing PCM. Instead, you'll be using PWM, which is an analog process. It can be adapted very nicely for use with digital systems.

The specific forms of PWM used in the amps to which you referred is either Delta or Delta Sigma.

Read the Wiki article at the link.

Notice things like 'waveform', 'integration' and so on- all analog thingys.

The fact is the world is analog and true digital does not exist in it. That is why IBM developed the parity bit.