Class D

Class D is a pulse-width modulation technology, meaning that the audio signal amplitude information is all contained in the width of the pulses (which is analog, by the way).

The switching frequency is therefore exactly the same issue as it is with PCM digital audio. The frequency only has to be high enough such that it can be filtered out with minimal amplitude and phase errors in the audio band.

But since the information itself is actually analog (e.g. the width of the pulses) as is the input signal, global feedback can easily be applied to correct for amplitude and phase errors, so achieving a clean response is even easier than it is with digital audio.

So the notion that you need Mhz sample rates to achieve high-quality reproduction is pretty ridiculous, let alone Ghz rates.

All I can say Ralph after all your put many downs on anything mentioned threatening the release your upcoming Class-D. And all the technical praise you give it.

1: Better be a real good one
2: Designed by you.
3: Have no after market "tweaked" BS modules like, ricevs, pascal, Rowland, red dragon etc etc etc, it may exposed for doing it.
4: Be reasonably priced

The notion that you need Mhz sample rates to achieve high-quality reproduction is pretty ridiculous

No because it's only to get the low order output filtering on the speaker output up high also, so then you can get rid of "all switching noise" without effecting the phase integrity down into the audio band.
Like effects this. 70 degrees out of phase at 10khz and still out of phase at 1hkz https://ibb.co/vvwzGV5
And mhz switching frequency will DO IT WITHOUT the use of large amounts "global feedback". And ghz in the future even more so maybe one day.

NB: Not ridiculous!!!

No because it's only to get the low order output filtering on the speaker output up high also, so then you can get rid of "all switching noise" without effecting the phase integrity down into the audio band.

This has been explained ad nauseum; this statement is rubbish.

All I can say Ralph after all your put many downs on anything mentioned threatening the release your upcoming Class-D. And all the technical praise you give it.

1: Better be a real good one
2: Designed by you.
3: Have no after market "tweaked" BS modules like, ricevs, pascal, Rowland, red dragon etc etc etc, it may exposed for doing it.
4: Be reasonably priced

OK- we got 2 and 3. Working out the math for the oscillation criteria was a real female dog.... How 'good' it is- we'll leave that to others. We are planning about $5,000 for a pair of 100 watt monoblocks. That's beta production; the actual power might be increased by the time we see production.