OT Re: [sdiy] Bob Moog - Mini pulse widths

[cheater cheater]

Very interesting.
Especially audible in the triangle wave tapped from the main output.
Can it be that the VCF still modified the high frequency content?

D.

On Sat, Aug 29, 2009 at 3:51 AM, tj<daytona at verizon.net> wrote:
> I put up a few samples of my 1974 Mini with the middle revision "741"
> oscillator board. Was able to get samples direct from oscillators and after
> filter, VCA at the high output. Filter and VCA wide open, no resonance, the
> waveforme get quite dirty, compared to the originals.
>
> Also sampled my 40 year old 1P with a build date of August 1969. There are
> raw samples of the 901 oscillators waveforms. Then after the CP3 mixer, both
> at unity gain (about 7 on the mixer input and 10 for the mixer out), and
> double gain with mixer inputs set at 10. (The CP3 has 2X gain.)The mixer is
> part of the sound as they overdrive. Next individual waves after an open
> 904A with no resonance. And some combinations of the three oscillators at
> different gains. Finally a few samples after the 902 VCA. (needs a little
> offset adjust.)
>
> Not sure if these are of any use? But they are fun to observe how the
> different modules, shape and interact along the way. Two pages, one with
> Mini, one modular. Zip files at bottom with all waves. No magic, just a
> unique tone!
>
> Mini page:
> http://mysite.verizon.net/vze6s1hi/moog1p/id3.html
>
> Modular page:
> http://mysite.verizon.net/vze6s1hi/moog1p/id2.html
>
>> Better yet:
>> if you have a digital multitrack, please record each of the VCOs
>> separately, and the mix before the filter, and the mix after the
>> filter before the vca, and the mix after the vca. All at once, so that
>> we can see what happens where.
>>
>> I bet Bob Moog would have loved to be able to analyze his circuits like
>> this :)
>>
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