buchla source of uncertainty success!

[mark verbos]

Today I had success with severaly of the Buchla random modules.


-The digital prsg configured to be like a digital sample and hold of
noise. Really cool, but I couldn't get it to clock at audio rate. i will
work on that because when grant showed me that sound, I was converted.

-The random voltage source. Its a 555 based cock, a sample and hold and a
vc slew all back to back. From voltage you can control how vast the
random voltage is changing. this is the coolest random thing I have ever
used. of course it uses 2 Vactrols. i think it could be converted to OTAs
but thats too much Math for me. anyone?

-My own variation of the stored random with correlation. i used a 4066
insted of a FET. It is really cool to be able to control how far the next
random voltage will be from the last. I was impressed.

I also build the noise from the 265, the older source of uncertainty, but
I had real problems. I used a 3906 insted of the 4248 in the schematic
and there was no gain at all. i tried lots of things but I only got more
whistling oscillation. I then switched to a 3904 in the way that it is in
Barry Klein's book. I still couldn't get enough gain out of the single
OPAmp in the Buchla. If i use a 4248 will this all go away? Should I just
add another gain stage opamp?  hmmmmm.

funny thing is the second stage ("low") was REALLY loud. so the later
parts of the circuit had no problem with it. There is a phaselock loop
oscillator that the sample and holds are sampling.


--
mark verbos

"if you want something done right, build it yourself."

verbos at simple-answer.com
www.simple-answer.com

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