[sdiy] Dispersive Karplus-Strong

[Mike Bryant]

The latter, and contracted as well.   The piano has lasted so many centuries precisely because it can stretch the fundamentals and then the harmonics by different amounts.  Oddly the larger the piano, the nearer you could get to a non-stretched sound, but then you adjust them to sound like a grand piano should anyway.

I have a large number (1024 per processing element) of modelling elements and you can assign any frequency to them.  

-----Original Message-----
From: cheater cheater [mailto:cheater00social at gmail.com] 
Sent: 18 February 2022 17:43
To: Mike Bryant
Cc: synth-diy at synth-diy.org
Subject: Re: [sdiy] Dispersive Karplus-Strong

Mike,
thanks. Was the stretch constant (i.e. all harmonics are stretched by eg 10%) or was it progressive (eg higher harmonics are stretched more than lower harmonics)?

Can you do contracted-harmonic synthesis with that as well?

Best regards

On Fri, Feb 18, 2022 at 6:28 PM Mike Bryant <mbryant at futurehorizons.com> wrote:
>
> I create stretched tuning but using a different set of models by JOS.
>
> Best to start at :
> https://ccrma.stanford.edu/~jos/pasp/Commuted_Piano_Synthesis_Architec
> ture.html
> and then work backwards :-)
>
> I think this model gives you more freedom to model things with viable complexity, at the expense of a lot of upfront effort calculating the impulse.    But all of these approaches approach the same mathematical end result from different directions.
>
>
> -----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 17:08
> To: synth-diy
> Subject: [sdiy] Dispersive Karplus-Strong
>
> 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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