[sdiy] Fwd: Filter Help

[Mattias Rickardsson]

Oops, this ended up as Reply instead of Reply-All. Oh well:

---------- Forwarded message ----------
From: Mattias Rickardsson <mr at analogue.org>
Date: 23 February 2018 at 08:07
Subject: Re: [sdiy] Filter Help
To: Tim Ressel <timr at circuitabbey.com>

Around 0.2 V/octave is what you will get out of the 2164 itself with its 33
mV/dB VCA CV response. I guess this is scaled to 1 V/octave with an op-amp
in the schematics? (Haven't looked.)

They should scale very well, I enjoyed playing well-tuned polyphonic
organ/bell-like sounds with 2164 SVF resonances the other day, verifying
the swap from the old defunct Panasonic tempco to a Vishay. :-)

/mr

Den 23 feb. 2018 01:42 skrev "Tim Ressel" <timr at circuitabbey.com>:

Hi

I am trying to get a 2164 SVF design to behave. I can't seem to get the
frequency scaling right. It is very sensitive to CV. I thought you can make
a volt/oct filter out of it. btw I am going off the Shruti schematic.
Anyone got some stick time on this puppy?

-- 
--Tim Ressel
Circuit Abbey
timr at circuitabbey.com

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