[sdiy] diagnosing polysix output noise (fwd from AH)

[Adam (synthDIY)]

> On 28 Mar 2026, at 00:50, Jimmy Moore <jamoore84 at gmail.com> wrote:
> Modifying the filter cutoff or resonance does NOT change the noise timbre. There may be a slight relationship between changing the resonance and that triggering the the noise. But only very slight.


But you'll agree that in your example recording, the noise has more high frequency content when the note is playing, than later when the note dies away?
If not affected by the filter directly, then there may be some relationship with the note envelope

> 
> On Thu, Mar 26, 2026, 11:35 PM Adam (synthDIY) <synthdiy at adambaby.com <mailto:synthdiy at adambaby.com>> wrote:
>> Interesting noise!
>> 
>> Sounds to me like the noise is being affected by the filter - would you agree? If so, it's not coming from the Effect Board BBD
>> 
>> A

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