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

Adam (synthDIY) synthdiy at adambaby.com
Thu Feb 17 01:27:03 CET 2022

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?

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