Hi Roman, thanks for your reply. I'm afraid i can't use a soundcard to capture the input from the piezo (I don't want to buy one just for three little triggers). If what you're saying is true i guess i will just use three switches and forget about the sensitivity.
Pierre 2011/6/17 Roman Haefeli <reduz...@gmail.com> > Hi Pierre > > Actually, I wouldn't connect the piezos to an arduino, but to a sound > card, because the piezos will likely give very very short spikes and the > sampling rate of the analogIns of the arduino is quite low (don't know > the exact value) compared to the sampling rate of a common sound card. > Also, you have more control in Pd to build a trigger detection filter > then on the arduino. Also you would likely get much lower latency with a > good audio setup than with the atmega->ftdi->usb->comport path. Also > when using the soundcard, the latency is constant, while you would have > glitches with the arduino. > > I'd be glad to hear other opinions, though, since my thoughts are purely > theoretical. I haven't implemented a piezo-based trigger, neither with > sound card nor arduino. > > Roman > > On Fri, 2011-06-17 at 14:27 +0200, Pierre Massat wrote: > > Dear List, > > > > This is yet another question about Arduino. Sorry about that. > > I want to use piezos to trigger samples using my arduino board. I want > > the trigger to be sensitive, and a quick google search seems to show > > that piezo is the way to go. > > Does anybody have any experience with piezo triggers (what type of > > piezo, isolating each piezo, etc.)? I will hit the piezos with my bare > > fingers (no drumsticks or anything like that), but i guess it doesn't > > really matter since i can control the threshold within Pd. > > > > This last sentence is just to make sure that everyone knows i'm > > talking about piezos in case there wasn't enough occurences of the > > word in my message. > > > > Cheers! > > > > Pierre > > _______________________________________________ > > Pd-list@iem.at mailing list > > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > > >
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