[PD] Sympathetic strings

Pierre Massat pimassat at gmail.com
Fri Feb 12 14:13:52 CET 2010

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!


2010/2/12 Pierre Massat <pimassat at gmail.com>

> Thank you Derek! I'll give it a look.
> Best,
> Pierre
> 2010/2/11 Derek Holzer <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"
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