[sdiy] Polymoog resonator question

Rutger Vlek rutgervlek at gmail.com
Thu Oct 11 19:28:34 CEST 2018


That's also something I'd be happy to try on my Nord G2 if I can find some time. I'll try to record some examples of how it sounds...

Rutger

On 6 okt 2018, at 10:34, Donald Tillman wrote:

> 
>> On Oct 6, 2018, at 1:03 AM, David G Dixon <dixon at mail.ubc.ca> wrote:
>> 
>>> And it is somewhat compensated for in those resistor mixdowns 
>>> before the 4016.
>> 
>> I haven't really looked at that part of the circuit too closely yet, but I
>> am intrigued by the "E" output, which seems just to add an inverted version
>> of the middle resonator's BP output to the other BP outputs.  I wonder how
>> cool that sounds.
> 
> Good question; the "E" output isn't available on the standard Polymoog. (!!!)
> 
> The "E" output is the sum of the three bandpass responses with the middle one inverted.
> 
>> Also, I'll probably add a fourth resonator (and change the
>> frequency ranges accordingly) because I need two 2164 VCAs for each
>> resonator, so I'll have two spares.  I've figured out a way to build each
>> resonator with one quad and half of a 2164, and that includes both manual
>> and CV control of frequency, so the layout will be very efficient 
> 
> Dude named his first born "2164".  :-)
> 
>  -- Don
> --
> Donald Tillman, Palo Alto, California
> http://www.till.com
> 
> 
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