you should update that to pd then :) havent opened csound since the nineteen hundreds as well....
these digital waveguide pd patches are gorgeous, it all sounds beautiful... to hell with some lousy drums sounds... but in order to digest this, I need some time now.
cheers
2013/8/31 Ed Kelly morph_2016@yahoo.co.uk
Years and years ago (1996) I made a CSound script, with the control rate set to the same frequency as the audio rate, and used it to generate FM Karplus-Strong. A sine wave modulating a Karplus-Strong string model's frequency.
I swept the modulation frequency through the experiment, while generating regular impulses to pluck the "string" and there were indeed some quite snare-like sounds in the more dissonant carrier/modulator relationships - i.e. where the ratios were more like 32:31 than 5:4. The carrier being the KS string model and the modulator being the sine wave.
If you're doing everything with vd~ then you can emulate this. I think I still have it on one of my hard drives, but I don't know which or where. I'll try to dig out the audio tomorrow...(today? for some reason I am awake at 6am) and possibly even the CSound orc/sco files !?!?!
Cheers, Ed
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*From:* Alexandre Torres Porres porres@gmail.com *To:* Jonathan Wilkes jancsika@yahoo.com *Cc:* pd-lista puredata pd-list@iem.at *Sent:* Saturday, 31 August 2013, 5:38
*Subject:* Re: [PD] karplus drum?
I'm not gonna go through the paper at all anyway, I couldn't and shouldn't...
but I've just finished implementing in Pure Data a patch from that Max forum... seems to be working, but the "drum" part, as it says, it's only
"modulating the feedback so that it alternates quickly between either +1-1. different frequencies of modulation create different sounds, with high frequencies sounding a bit like a snare"
it's true, but I know you could also make some bass drum sounds, as I've seen in here https://ccrma.stanford.edu/~jos/aiff/ksdrum.aiff
what interests me, nevertheless, is learning new tricks and tweaking the values so they sound more bizarre of course.
cheers
2013/8/30 Alexandre Torres Porres porres@gmail.com
here's the original paper by the way
http://users.soe.ucsc.edu/~karplus/papers/digitar.pdf
2013/8/30 Alexandre Torres Porres porres@gmail.com
Hi. There is a modification to the algorithm that makes it sound more like a drum. Here's a topic about it
http://cycling74.com/forums/topic/karplus-strong-extension-drum-synthesis-al...
gonna try and translate it to Pd, but wondering if anyone has ever done it already ;)
cheers
2013/8/30 Jonathan Wilkes jancsika@yahoo.com
On 08/30/2013 05:04 PM, Alexandre Torres Porres wrote:
hi there, anyone knows of a drum made of karplus strong implemented in Pd?
What kind of drum? For a snare it's just a matter of choosing a low-enough frequency, then probably slapping on some reverb and other little touches to make it more interesting.
I think it's just a matter of starting with a Pd implementation of Karplus-Strong and tweaking the variables. And depending on the type of drum, you can get a lot of variety from tweaking the shape of the decay-- that is, how you attenuate the "chunk" of noise before you feed it back in.
-Jonathan
thanks
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