Cgs synth

It is producing some of the sounds I would expect. At around the 4 second
mark it is sounding pretty correct. You will find it is frequency dependent
to some extent (a fixed lag versus a varying input frequency) so that may be
why you are finding the pots do "the same thing". These pots are unlike the
usual pots say in a filter, where you have two clearly marked functions (res
and freq), which is why they have somewhat unusual names, i.e. drive and
lag. Drive determines how much signal is being fed back, while lag adds time
lag to the settling of the servo loop.

Ken

>I still don't fully understand what I should expect from this module. I
>listened to the sample file in the yahoo group archive, and since I don't
>know what the original signal was, I can't glean much insight.
>
>Since you said that an oscilloscope can help choosing an op-amp that does
>the right thing, here's a screen shot of a square wave run through my
>Grinder section, with both controls set to their middle position:
>http://studionebula.com/images/CGS-WM-graph.jpg
>
>Here's an audio file of its output, same square-wave input:
>http://studionebula.com/sounds/modular/CGS_WM_test.mp3
>In this file I start with both controls rotated fully CCW. I turn one all
>the way up and then all the way back down, then the other all the way up and
>all the way back down, then one up to its middle position and leave it
>there, then turn the other up to its middle position. If you can't tell
>which knob is which, then you're understanding my point. :-)
>
>Thanks in advance to any other Wave Multiplier owners who can take a
>look/listen to these files and tell me whether or not mine seems to be
>operating properly.
>
>--Adam
>
>> -----Original Message-----
>> From: sasami@... [mailto:sasami@...]
>> Sent: Sunday, September 25, 2005 3:58 PM
>> To: cgs_synth@yahoogroups.com
>> Subject: RE: [cgs_synth] Finally! The Wave Multiplier is built.
>>
>> Basically the grinder is exploiting exactly what you DON'T want in a
>> typical
>> servo system (such as the feedback of an op-amp. It causes the op-amp to
>> overcompensate, then overcompensate in the reverse direction etc,
>> effectively causing a high pitch ringing on the output wave. If you have
>> an
>> oscilliscope, it can help choosing a chip.
>>
>> Ken
>>
>>
>> >I am also happy with my recently completed Wave Multiplier, although I am
>> >somewhat non-plussed by the Grinder section. It seems that its two
>> controls
>> >have basically the same effect on the timbre, although with slightly
>> >different ranges of operation and some interdependence. It also sounds
>> more
>> >like a resonant filter than something I'd describe as a "grinder". Do
>> other
>> >Wave Multiplier owners observe similar behavior in their grinders, or is
>> >there something wrong with mine?
>> >
>> >--Adam
>> >
>> >
>> >
>> >
>> >
>> >
>> >The CGS Modular Synth home page: http://www.cgs.synth.net/
>> >
>> >Yahoo! Groups Links
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> _______________________________________________________________________
>> Ken Stone sasami@... or sasami@...
>> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
>> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>>
>>
>>
>>
>> The CGS Modular Synth home page: http://www.cgs.synth.net/
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
>

_______________________________________________________________________
Ken Stone sasami@... or sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>