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"unintended PWM"

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"unintended PWM"

Postby miczac » Thu Aug 10, 2017 8:05 am

Hi,
in an article of a German magazine, when talking about design issues of vintage gear, which sometimes led to today's hyped character of a particular instrument:
The author tried to give an example and he casually mentioned an "unintended PWM on the VCOs of the Moog modulars".
Alas he wasn't specific enough to name a model number of the synth or module or such.
Anyone knows what he's probably talking about?
Thanks - Michael.
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Re: "unintended PWM"

Postby noddyspuncture » Sun Aug 13, 2017 2:12 pm

Well it can only be either the early 901's or the later 921's... Moog Modulars only use those... and my bet is it's the 901...:)

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Re: "unintended PWM"

Postby miczac » Sun Aug 13, 2017 2:46 pm

yeah, but what's the issue?
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Re: "unintended PWM"

Postby EricK » Mon Aug 14, 2017 8:41 pm

Maybe tell us exactly which article you read this in so that anyone with technical knowledge who can help you knows the exact context of the statement.
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Re: "unintended PWM"

Postby miczac » Mon Aug 14, 2017 9:20 pm

In German Synmag the author tried to give an example for a "happy accident" in synth design and he casually mentioned an "unintended PWM on the VCOs of the Moog modulars". Nothing more. It was merely a line, but it got my attention and I became curious.
I have no 901s or 921s, and the 901s I worked with were so heavily modified they probably wouldn't reveal such a thing. So I can't tell from experience.
But maybe it's just nonsense?
I'll try to get in touch with the author.
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Re: "unintended PWM"

Postby EricK » Tue Aug 15, 2017 12:34 am

Which issue?
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Re: "unintended PWM"

Postby noddyspuncture » Tue Aug 15, 2017 9:20 am

miczac wrote: and the 901s I worked with were so heavily modified they probably wouldn't reveal such a thing.


What were the 'modifications" if you don't mind me asking....?
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