[sdiy] Dispersive Karplus-Strong

Mike Bryant mbryant at futurehorizons.com
Fri Feb 18 19:09:32 CET 2022


Not quite.  He's using lots of APFs as the 'z-1' elements, this giving near infinite flexibility over the effective sampling rate the feedback loop sees.



-----Original Message-----
From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of cheater cheater via Synth-diy
Sent: 18 February 2022 17:41
To: Jacob Watters
Cc: synth-diy
Subject: Re: [sdiy] Dispersive Karplus-Strong

Jacob,
Look at the block diagram, he uses an APF and delay (called z^-1) at the same time.

On Fri, Feb 18, 2022 at 6:29 PM Jacob Watters <jacobwatters at gmail.com> wrote:
>
> Do you mean using an all-pass filter as the delay? I thought about trying that, but figured I will need too many of them in series to get a usable range. I should test it out.
>
> I did, however, try overclocking a PT2399. It was stable at 8V and was suitable for bass notes.
>
> Jacob Watters
> JacobWatters.com
>
>
> On Fri, Feb 18, 2022 at 12:10 PM cheater cheater via Synth-diy <synth-diy at synth-diy.org> wrote:
>>
>> Hi, I was wondering if anyone ever tried Karplus-Strong synthesis 
>> with an all-pass filter (APF) in the feedback, in order to obtain 
>> stretched tuning, and what your results were.
>>
>> https://ccrma.stanford.edu/~jos/pasp/Dispersive_1D_Wave_Equation.html
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