[sdiy] 36dB VCF output drop while increasing emphases

[Andrew Simper]

On 19 April 2015 at 02:22, Harald <sdiy at haraldswerk.de> wrote:
>
> I don't see that on this schematic. The second OTA is used as VCA for the output of LP4.
>
> Am 18.04.2015 um 19:15 schrieb Chris McDowell:
>>
>> You might try what Olivier from Mutable did on "Ripples"
>>
>> http://mutable-instruments.net/static/schematics/Ripples-v01.pdf
>>
>> The input goes through the same OTA controlling feedback for resonance.
>> Perdy clever!
>>
>> Threeler sounds amazing, Ian. I'll have to give it a go someday :)
>>
>> Chris
>>>
>>>

The 13700 under the cascade as "IN" to the positive input. This
method, I'm guessing Olivier borrowed from the Juno / Jupiter synths
by Roland, changes the frequency response of the signal being shaped
by the resonance non-linearitity - which will change the tone of the
filter considerably with increasing resonance compared to the version
without such gain normalisation.

Andy