Wow, Mike, I didn't know the technique was this old. But sometimes it takes a long
time. Like spread spectrum which I believe was invented by an Austrian actress but
took about 20 years to get going. Now it is everywhere.

With class D it takes some company to get enough engineers behind it and I bet they
could make a stellar product. Question is whether the market is there or whether
people think that what they got now is good enough.

Regards, Joerg.