[sdiy] Korg 35 chip

[Richard Atkinson]

Well of course if you can have both you should!

The Korg35 is one of the truly original filter designs; the OTA filter is a 
bit more generic. Korg were clearly trying to get away from the rawness of 
their earlier design and provide something capable of warmer, more 'fat' 
timbres like their American rivals. I really like the sound of the OTA 
filter in the synthe section of the Korg X-911 guitar synthesizer, and if I 
bought an MS-20 I would get the OTA version, but then I already have the 
Korg35 filter (several of them!) in the Sigma, MS-10 and instrument section 
of the X-911.

On Jun 19 2010, David G. Dixon wrote:

>> It's the world's dirtiest Sallen & Key low pass filter design - I can't
>> believe how noisy the filter resonance gets on this thing.
>> 
>> I had the opportunity to play with a later OTA-based MS-20 today - the
>> gulf between the two filter designs is enormous!
>
>Which one do you prefer?
>
> Now that I've finished my 2164 4P LPF (panelizing it tonight!), I'm 
> thinking that my next project will be a clone of the later MS-20 HP-LP 
> filter, only with 2164 VCAs (and, thus, no expo converter) instead of 
> OTAs.
>
>I might do something with the older MS-20 filter, but I haven't decided.

Well