Le mardi 26 juin 2007 à 13:35 +0200, henrik wurster a écrit : > hello gang, >
Hi Henrik! > I have a project with pd using piezo sensors attached to my bongos > underneath the skins. they actually work not too bad as microphones, > but what I want to do is trigger the strokes being played on the bongos. > in the end I want to trigger matching samples which I recorded previously. > in my research how to detect small percussion instruments, I stumbled > upon the bonk object, but don`t know how to work with it, because I am > really new to pd...:) I recently had to develop something similar, a darbuka player triggering video samples, launching effects and so on. Technically, we pasted a very basic Yamaha DT20 piezo microphone (24€) to the socket of the darbouka, not to the skin because of tone alteration. We sticked the pieoz to the faience way of "Patafix", french name for UHU Tac in Germany/Schweiz, (double sided tape doenst work since most percussive instruments are round ;-). The Yamaha is ok , it's cheaper and not so hard to DIY but i'm no soldering iron maestro. I made a patch that detects odd/even beats (very basic, [alternate] ) , silences and pitch using the Aubio library by piem. Why not bonk~? it reminds me too much of the old Max/M$P days... Basically, onsets trigger a pulsating video effect, whose value increases across time and the player's loudness (using aubioonset~ and a settable threshold value for better live feeling) onsets also triggers pitch detection: when this value is located within various intervals, it modifies the video sequence being played (kidn of sampler). I use chained [moses] objects for that purpose. i also track gain after a [env~] and [oneshot] object cleared by the "odd beat" onset detection to track "silence" and have the video faint away > I dont expect any patching, but can anybody help me to give me an idea > how I could start buiding the patch ? I thought about loading the samples > into an array, but does bonk work at all checking sounds with recorded > samples ? thanks for any piece of advice > Actually, you've got two sub-programs: a first one that detect pitch/onset , then the audio sample player, + some glue around it. bonk~/fiddle~ only fits in the first. ++ OH > best regards, > - henrik > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list
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