[sdiy] Buchla 266 fluctuating voltages

[Peter Grenader]

I've got to agree with John though - it looks great on a scope and a
spectrum analyzer.  To the ears though it's much thinner sounding than
standard diode noise sources and tends to have an isolated lower band..  For
creating random voltage sources though - it  rocks.

- P

harrybissell wrote:

> In a low to medium end synth (monopoly) you might understand this... but
> early run Prophet V rev 3.2 used this chip as well...
> 
> hel LOOO.... what were you thinking ???
> 
> H^) harry
> 
> john mahoney wrote:
> 
>> Hiya, kids! I was on vacation for a week, in Toronto with the Missus. So,
>> there goes the neighborhood again. ;-)
>> 
>> Here is a web page with 2 audio samples of the MM5837:
>> http://www.ciphersbyritter.com/NOISE/NOISRC.HTM
>> Listen to the long sample and the looping should be obvious.
>> 
>> This is a textbook case of something that measures well but sounds like
>> crap! Look at the graph -- it shows a beautifully balanced frequency
>> spectrum. As Harry wrote, the chip is useful for some things but it's lousy
>> as a noise source for a synth.
>> 
>> The Korg Mono/Poly originally used the MM5837, but later models had analog
>> noise sources.
>> --
>> john
>> 
>> ----- Original Message -----
>> From: "harrybissell" <harrybissell at prodigy.net>
>> To: <music.maker at gte.net>
>> Cc: <synth-diy at dropmix.xs4all.nl>
>> Sent: Sunday, May 30, 2004 5:40 PM
>> Subject: Re: [sdiy] Buchla 266 fluctuating voltages
>> 
>>> Of course the 5837  (the only known chip to SUCK MORE than a bbd...) is
>> the
>>> perfect example of a too-short shift register with a too-low clock rate.
>>> 
>>> For its intended purpose, an audio noise source for room equalizing
>> instruments...
>>> the
>>> warts will really not matter, its 'good enough' for 1/3 octave, yes ???
>>> 
>>> As a synthesizer noise source, it, well... sucks :^P
>>> 
>>> H^) harry
>>> 
>