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

[Chromatest J. Pantsmaker]

I put seven in mine.

On Wed, Feb 16, 2022 at 6:37 PM Peter Pearson via Synth-diy <
synth-diy at synth-diy.org> wrote:

> 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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