[sdiy] CEM3340 Black Friday Sale

[David Ingebretsen]

Nyle Steiner used diodes as voltage controlled resistors in his filter and
VCA. See here:

http://user.xmission.com/~dingebre/VCA.html
http://user.xmission.com/~dingebre/VCF.html



David

-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of dan snazelle
Sent: Sunday, November 27, 2011 10:18 AM
To: aankrom
Cc: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] CEM3340 Black Friday Sale


On Nov 27, 2011, at 10:24 AM, aankrom wrote:

> I've often wondered if, on circuits that use a diode as a voltage
controlled resistor, if adding a 2nd diode in series would create something
close to exponential response. I don't even know why this occurs to me. It's
just that in the back (of the front) of my head, something is saying, "Hey,
the math is close..." I think it's from seeing it done in other circuits.
I've even seen three diodes in series - not counting diode ladder filters...
> 
> AA





which circuit are you referring to that uses a diode as a vcr? The thomas
henry flanger? or something else?

i am interested in this experiment!



thnks


> 
> On Sat, 26 Nov 2011 11:57:56 -0500, KA4HJH wrote:
>>> I added that waveform to my PIC tap tempo LFO for exactly that purpose.
>>> It's a lot cheaper to do it with a £2 PIC than a CEM3340.
>>> 
>>> http://www.electricdruid.net/index.php?page=projects.taplfo
>>> 
>>> As to whether it genuinely makes a better flanger, I still don't know.
>>> I've never tried it. It makes a good trem though!
>> 
>> It makes sense that a comb filter would sound better with exponential 
>> response but I've never heard it done. All it would take is a cheap 
>> expo convertor before the clock, no need for something fancy.
> 
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