[sdiy] Quad VCA Chips ( was quite erroniously Quad Op-Amp Chips!!!)

[Romeo Fahl]

Roman Sowa has used the 2164 a bit too.  Check out his VCF at:

http://www.sowa.synth.net/modular/vcf.html


On May 16, 2006, at 5:35 PM, Ryan Williams wrote:

> Matthew Hearn wrote:
>> I just ordered some samples from Analog Devices including 2 ssm2164p 
>> quad VCA chips.
>> I was quite excited when I read the datasheet for these, I was 
>> wondering weather anyone has any experience of these IC's or has done 
>> anything interesting with them
>
> yes a few interesting things have been done with them (not me though). 
> take a look:
>
> lp-VCF:
> http://userdisk.webry.biglobe.ne.jp/000/024/65/1/VcfSSM0602a.GIF
> phasers:
> http://userdisk.webry.biglobe.ne.jp/000/024/65/1/Vcph0505.GIF
>
> thats Osamu Hoshuyama's page and he clearly states that you should 
> understand the circuits before building, but even if not, I think that 
> VCF could be built by most. also, the most interesting thing i've seen 
> is the linear VCA using two of them, one in a feedback loop. There's a 
> edn article about this by mike irwin (don't have the link) but you can 
> see an example of it here:
>
> http://m.bareille.free.fr/modular1/quadvca/quadvca.htm
> Marc Bareille's page.
>
> ,ryan williams (also has a few samples sitting in the parts box)
>