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@gmail.com>
Thank you Derek! I'll give it a look.
Best,

Pierre

2010/2/11 Derek Holzer <derek@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"