[sdiy] 36dB VCF output drop while increasing emphases

[Harald]

Thank you Carsten, I think making it adjustable is the way to go. I have 
outputs for every pole like in the 24dB Formant VCF. But increasing gain 
with feedback needs a OTA for every output. Way to much. Hmmm, thinking 
about making this switchable as well.

Harald

www.haraldswerk.de

Am 17.04.2015 um 17:01 schrieb Carsten Toensmann:
> The MS20 for instance has an adjustable peak which adds som very cool
> distortions to the sound, so I would make it adjustable. The same for the
> amount of poles, as there are musical applications for 12db (e. g. drum
> simulation), 24db and so on.
>
> Carsten
> www.analog-monster.de
>
> -----Ursprüngliche Nachricht-----
> Von: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] Im Auftrag von Harald
> Gesendet: Freitag, 17. April 2015 14:08
> An: synth-diy at dropmix.xs4all.nl
> Betreff: [sdiy] 36dB VCF output drop while increasing emphases
>
> I am just working on a 36dB VCF. Plain forward design with LM13700.
> First steps here:  http://www.haraldswerk.de/wrdprs/ . As we know, output
> level decreases with feedback (Q). This can be compensated with increasing
> the output gain while increasing Q. But then the peak level of the output
> will be way higher as the normal output. Which might cause distortion in the
> next stage. Is there a compromise to avoid this or do i need to select:
> Lower output or increased distortion?
>
> Second thought: The filter works quite good. Does it make sense to go for
> 48dB musicaly?
>
> Harald
>
> www.haraldswerk.de
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