[PD] Sympathetic strings

Derek Holzer derek at umatic.nl
Fri Feb 12 14:28:33 CET 2010

Hi Pierre,

ah yes, Karplus-Strong, I forgot that keyword!

As for the analysis time of fiddle~, remember that computers aren't 
really real-time systems ;-) Besides that, you can change the analysis 
window size. Smaller windows equal faster analysis but less precision 
for lower frequencies. But yes, maybe new thread....

Good luck!

Pierre Massat wrote:
> Hi,
> I have tried your patch called karplus-strong. This is just amazing! 
> This solved two problems at once : getting a sitar-like sound plus a 
> sympathetic strings simulation. Thank a lot!
> Although i think i should open a new thread about this, i was a little 
> shocked by the time fiddle~ takes to output a pitch (i used it to 
> control a resonator with my guitar). I think it was way above 10 ms. I 
> haven't tried sigmund~ yet, though. Do you know what latency i should 
> expect? I think 5 ms should do.
> Anyway, thanks again for introducing me to the Karplus-Strong model!
> Pierre
> 2010/2/12 Pierre Massat <pimassat at gmail.com <mailto:pimassat at gmail.com>>
>     Thank you Derek! I'll give it a look.
>     Best,
>     Pierre
>     2010/2/11 Derek Holzer <derek at umatic.nl <mailto:derek at umatic.nl>>
>         Hi Pierre,
>         I've found resonant comb filters to be the most useful in both
>         simulating string sounds, and in getting sympathetic resonances.
>         There's tons of stuff in the list archives on them, in
>         particular a patch (maybe I even posted it) on calculating the
>         correct delay length for produce a given pitch. Search for "comb
>         filter".
>         Best
>         Derek
>         Pierre Massat wrote:
>             Hello everyone,
>             I was wondering if anybody on this list would have an idea
>             of how one can simulate sympathetic strings in pd, using any
>             kind of audio input (especially NOT midi). I tried making a
>             patch with 12 resonating filters (moog~), each tuned to a
>             particular frequency belonging to the chromatic scale, but
>             the result wasn't too good (it sounded more like a weird
>             reverb).
>             My problem is basically that of isolating certain
>             frequencies in the input sound. I don't believe that objects
>             like fiddle~ or sigmund~ would be very helpful in that
>             matter, as they always start freaking out once you feed them
>             with chords.
>             I haven't found anything useful on the internet yet.
>             Any idea?
>             Pierre
>         -- 
>         ::: derek holzer ::: http://macumbista.net :::
>         ---Oblique Strategy # 130:
>         "Question the heroic"

::: derek holzer ::: http://macumbista.net :::
---Oblique Strategy # 205:
"First work alone, then work in unusual pairs."

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