[sdiy] 303 resonance was: emulating bi-polar capacitors

[Peter Pearson]

Wait... Do I need to recap my 303?  Or should I put a bi-polar cap in
there??

On Wed, Feb 16, 2022 at 7:29 PM Adam (synthDIY) <synthdiy at adambaby.com>
wrote:

> OK, sorry, I can hear the groans already, but I’m gonna take the bait
> here….
>
> On 16 Feb 2022, at 10:35 pm, rburnett at richieburnett.co.uk wrote:
>
> My impression is that leakage current through the cap fitted the wrong way
> round was decreasing the loop gain around the filter and making it less
> resonant.  So it might account for the fact that the TB-303 filter never
> quite manages self-oscillation without some other modification.
>
>
> So Richie, the 303 filter has a more “musical” high resonance than many
> other synths (some acid/electronic tracks only use it in high resonance
> settings, rather than as a ‘true’ bass sound). Do you think this is
> contributing to that?
>
> A
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