[PD] karplus drum?

[Alexandre Torres Porres]

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 at 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
>
>
> Ninja Jamm - a revolutionary new music remix app from Ninja Tune and
> Seeper, for iPhone and iPad
> http://www.ninjajamm.com/
>
>
> Gemnotes-0.2: Live music notation for Pure Data, now with dynamics!
> http://sharktracks.co.uk/
>
>   ------------------------------
>  *From:* Alexandre Torres Porres <porres at gmail.com>
> *To:* Jonathan Wilkes <jancsika at yahoo.com>
> *Cc:* pd-lista puredata <pd-list at 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 at 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 at 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-algorithm/
>
> gonna try and translate it to Pd, but wondering if anyone has ever done it
> already ;)
>
> cheers
>
>
> 2013/8/30 Jonathan Wilkes <jancsika at 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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