<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div><span>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.</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style: normal;"><span><br></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style: normal;">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.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style: normal;">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 !?!?!</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style:
normal;">Cheers,</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: arial, helvetica, sans-serif; background-color: transparent; font-style: normal;">Ed</div><div><br></div><div><br></div><div>Ninja Jamm - a revolutionary new music remix app from Ninja Tune and Seeper, for iPhone and iPad<br>http://www.ninjajamm.com/</div><div><br><br></div><div>Gemnotes-0.2: Live music notation for Pure Data, now with dynamics!<br>http://sharktracks.co.uk/ </div><br> <div><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px; padding-left: 5px;"> <div style="font-family: arial, helvetica, sans-serif; font-size: 12pt;"> <div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font size="2" face="Arial"> <b><span style="font-weight:bold;">From:</span></b> Alexandre Torres Porres <porres@gmail.com><br> <b><span style="font-weight:
bold;">To:</span></b> Jonathan Wilkes <jancsika@yahoo.com> <br><b><span style="font-weight: bold;">Cc:</span></b> pd-lista puredata <pd-list@iem.at> <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, 31 August 2013, 5:38<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PD] karplus drum?<br> </font> </div> <div class="y_msg_container"><br><div id="yiv1728896202"><div dir="ltr">I'm not gonna go through the paper at all anyway, I couldn't and shouldn't...<div><br></div><div>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<div>
<br></div><div>"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" </div><div>
<br></div><div>it's true, but I know you could also make some bass drum sounds, as I've seen in here <a rel="nofollow" target="_blank" href="https://ccrma.stanford.edu/~jos/aiff/ksdrum.aiff">https://ccrma.stanford.edu/~jos/aiff/ksdrum.aiff</a></div>
</div><div><br></div><div>what interests me, nevertheless, is learning new tricks and tweaking the values so they sound more bizarre of course.</div><div><br></div><div>cheers</div></div><div class="yiv1728896202gmail_extra"><br><br><div class="yiv1728896202gmail_quote">
2013/8/30 Alexandre Torres Porres <span dir="ltr"><<a rel="nofollow" ymailto="mailto:porres@gmail.com" target="_blank" href="mailto:porres@gmail.com">porres@gmail.com</a>></span><br><blockquote class="yiv1728896202gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div dir="ltr">here's the original paper by the way<div><br></div><div><a rel="nofollow" target="_blank" href="http://users.soe.ucsc.edu/~karplus/papers/digitar.pdf">http://users.soe.ucsc.edu/~karplus/papers/digitar.pdf</a><br></div>
</div><div class="yiv1728896202HOEnZb"><div class="yiv1728896202h5"><div class="yiv1728896202gmail_extra">
<br><br><div class="yiv1728896202gmail_quote">2013/8/30 Alexandre Torres Porres <span dir="ltr"><<a rel="nofollow" ymailto="mailto:porres@gmail.com" target="_blank" href="mailto:porres@gmail.com">porres@gmail.com</a>></span><br><blockquote class="yiv1728896202gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div dir="ltr">Hi. There is a modification to the algorithm that makes it sound more like a drum. Here's a topic about it<div><br></div><div><a rel="nofollow" target="_blank" href="http://cycling74.com/forums/topic/karplus-strong-extension-drum-synthesis-algorithm/">http://cycling74.com/forums/topic/karplus-strong-extension-drum-synthesis-algorithm/</a><br>
</div><div><br></div><div>gonna try and translate it to Pd, but wondering if anyone has ever done it already ;)</div><div><br></div><div>cheers</div></div><div><div><div class="yiv1728896202gmail_extra"><br>
<br><div class="yiv1728896202gmail_quote">2013/8/30 Jonathan Wilkes <span dir="ltr"><<a rel="nofollow" ymailto="mailto:jancsika@yahoo.com" target="_blank" href="mailto:jancsika@yahoo.com">jancsika@yahoo.com</a>></span><br>
<blockquote class="yiv1728896202gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div><div>
<div>On 08/30/2013 05:04 PM, Alexandre
Torres Porres wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">hi there, anyone knows of a drum made of karplus
strong implemented in Pd?</div>
</blockquote>
<br></div>
What kind of drum? For a snare it's just a matter of choosing a
low-enough frequency,<br>
then probably slapping on some reverb and other little touches to
make it more<br>
interesting.<br>
<br>
I think it's just a matter of starting with a Pd implementation of
Karplus-Strong and<br>
tweaking the variables. And depending on the type of drum, you can
get a lot of<br>
variety from tweaking the shape of the decay-- that is, how you
attenuate the "chunk"<br>
of noise before you feed it back in.<br>
<br>
-Jonathan<br>
<br>
<blockquote type="cite">
<div dir="ltr">
<div><br>
</div>
<div>thanks</div>
</div>
<br>
<fieldset></fieldset>
<br>
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