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Re: Fun with 490s

2004-01-19 by Mike Marsh

This is a nice demo!  I love the 'bounce' of the 490.

And I really appreciate hearing how people go about patching things.  
It never occurred to me to use an S&H that way.  I promptly 
dismantled a patch I was working on to try it out.  VERY INTERESTING 
technique...

Mike

--- In motm@yahoogroups.com, Richard Brewster <pugix@n...> wrote:
> I wanted to try something with my two MOTM 490 filters today.  This 
is 
> what I came up with.  Also this is the first sample I've uploaded.  
It 
> is three minutes long, hope the file isn't too large.  I mistyped 
the 
> title in the MP3, which says "Two MOTM 390 VCFs".  Oh well.
> 
> The audio part of this patch is two MOTM-300 VCO square wave 
outputs 
> each through a separate 490, then each through a MOTM-190 VCA 
driven by 
> its own MOTM-800 EG.  This is mixed to a stereo out.  The 490's are 
both 
> set at 2.5 resonance and the FREQ at 7.  The 1V/OCT inputs are not 
used; 
> the filters are not tracking with the VCOs.  The wigglyness is 
created 
> by modulating each VCF with a fairly rapid sawtooth LFO.   I used 
two 
> Oakley Little LFOs here, but the MOTM-320s would work fine too.  
The 
> sawtooths are negative in slope, i.e. falling most of the time with 
a 
> rapidly rising edge.
> 
> The control section is made up of a CGS Infinite Melody quantized 
with a 
> Blacet Miniwave.  The quantized output is shifted by a pair of 
sample 
> and holds, so that one VCO gets the voltage the other just had.  I 
used 
> the MOTM-120R as a pulse divider to drive the gate inputs of the 
800s to 
> produce the rhythm.  It's all clocked by a MOTM-390 LFO for the 
main 
> tempo.  Every 8 beats a third S&H feeds a new voltage to the Bank 
CV on 
> the Miniwave, which has the Quantizer EPROM installed.  (This third 
> random stepped voltage is also patched to the tempo LFO FM input, 
but 
> was not used during this recording. When it is, the tempo changes 
every 
> 8 beats too for maximal weirdness.)  I touched nothing during the 
recording.
> 
> I think it makes a nice demo of the timbre qualities of the 490.  
It 
> sounds really resonant without any other delays or phase shifts 
introduced.
> 
> -Richard Brewster
> 
> motm@yahoogroups.com wrote:
> 
> >Hello,
> >
> >This email message is a notification to let you know that
> >a file has been uploaded to the Files area of the motm 
> >group.
> >
> >  File        : /Two-490-VCF.mp3 
> >  Uploaded by : pugix <pugix@n...> 
> >  Description : Some fun with two MOTM 490 VCFs 
> >
> >You can access this file at the URL
> >
> >http://groups.yahoo.com/group/motm/files/Two-490-VCF.mp3 
> >
> >To learn more about file sharing for your group, please visit
> >
> >http://help.yahoo.com/help/us/groups/files
> >
> >Regards,
> >
> >pugix <pugix@n...>
> > 
> >
> >  
> >

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