Bruno Putzeys article

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I was reading about the origins of Class D amplification earlier and came across this interesting article from 2008. It's about Bruno Putzeys and how he designed and developed some of the first commercial Class D amplifiers:

https://spectrum.ieee.org/computing/hardware/bruno-putzeys-the-sound-of-music-extended-play

Here's an excerpt from the article that I enjoyed:

"In the end he decided he wasn’t cut out to be a music producer. But he also had an insight into the debate, endless among audiophiles, about coloration. “If it sounds good,” he says, “the right place to put it in is in a recording or mastering studio. There, an engineer can add the coloration that is appropriate to the music. You get an artistically informed choice about when the coloration is used, and when it isn’t. It’s better than using it indiscriminately all the time”—as would be the case if your amplifier added the coloration."

mhardy6647

. . . . . .

Clipdat

Cat got your tongue, Mark?

mhardy6647

Oh, I was just gonna mention that commercial Class D (i.e., pulse width modulation) audio amplifiers (at least in the form of kits) rather predate Putzey's work. I had decided that it wasn't really germane to the topic... but, since you asked...

http://www.vk6fh.com/vk6fh/sinclair x10.htm

1965


1967

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They were ahead of their time!

mhardy6647

You know about Sir Clive Sinclair, yes?
He was indeed ahead of his time in many ways

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mhardy6647

1974

Clipdat

Now that we got that out of our systems, does anyone want to actually talk about the article in the original post?

mhardy6647

Just happened upon this Someplace Else, speaking of Putzey. Interesting; still digesting it.
https://linearaudio.net/sites/linearaudio.net/files/volume1bp.pdf