Pd-list February 2016

pd-list@lists.iem.at

91 participants
131 discussions

weird pdp code
by Jonathan Wilkes 20 Feb '16

20 Feb '16

Hi List, Line 593 of pdp_imageproc_portable.c: /* affine x, y mappings in screen coordinates */ double mapx(double _x, double _y){return cx + izx * ( c * (_x-cx) + s * (_y-cy));} double mapy(double _x, double _y){return cy + izy * (-s * (_x-cx) + c * (_y-cy));} These lines are found _inside_ a function called pdp_imageproc_resample_affinemap_process. It's fun to focus on the substring "portable.c", and just read these lines a few times. :) -Jonathan

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egregore
by hi 20 Feb '16

20 Feb '16

Hi Cyrille, Nicolas et all i'm playing with egregore and am blown away! Thanks for sharing that with puplic. Unfortunatly i don't know much about pmpd. Now i want to alter things to my needs: # if i changeg from [draw line( to [draw points(, is there an easy way to draw bigger points? or even better change the size live? # i am looking for a way these points can form specific objects given by images, for example the example dancer (i don't understand the fluid instrument, which looks like it does something in that direction, and could be starting point for that matter) big thanks johnny

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Re: [PD] pd-0.46-7: segfault with jack-1.9.10
by Xavier Miller 19 Feb '16

19 Feb '16

Hi! Test without DBUS, same results: segmentation fault. I run jackd with those parameters: /usr/bin/jackd -P80 -u -dalsa -dhw:0 -r48000 -p512 -n3 Kind regards, Xavier Miller. Le 11/02/16 21:01, IOhannes m zmölnig a écrit : > On 02/11/2016 08:58 PM, Xavier Miller wrote: >> I use jack-dbus. I attached the ~/config/jack/conf.xml file > > would it be possible to *not* use jack-dbus for testing? > > mgfdsar > IOhannes > > > > _______________________________________________ > Pd-list(a)lists.iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list >

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Gem on Raspberry pi
by Antoine Villeret 19 Feb '16

19 Feb '16

Hi all, recently, Raspbian Gets Experimental OpenGL Driver [1]. So I build Gem and it works. I didn't test it deeply but few examples, from basics to shader passing through particule system work fine. For now, I don't know any way to create a Gem window without a X server, but maybe it's somehow possible. There are two versions in deken already, an APT one, and a more recent one. Cheers Antoine [1] : http://news.softpedia.com/news/raspbian-gets-experimental-opengl-driver-gpu… and http://www.framboise314.fr/raspian-jessie-nouvelle-version-avec-opengl/#mor… -- do it yourself http://antoine.villeret.free.fr

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expr if false, do nothing?
by Jonghyun Kim 19 Feb '16

19 Feb '16

hi list, how to *do nothing* when expr if is FALSE? like this: [expr if ($f1 > 0, 1, *do_nothing*)] thanks, jonghyun

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lop~ and hip~ difference equations
by Dario Sanfilippo 19 Feb '16

19 Feb '16

Hello, list. Do you know what the difference equations of [lop~] and [hip~] are? Just hoping that one of you has a quick answer, otherwise I'll try figuring it out by looking at the code. Anyway, they don't seem to be the same as [rpole~] as the impulse response is different. Thanks, Dario

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libpd: Reasonable test patches for testing libpd?
by Matti Viljamaa 19 Feb '16

19 Feb '16

Anyone have an idea what kind of patch to use for testing whether libpd is functioning correctly? I tried: [osc~ 440] -> [dac~] but since I’m not sure whether audio works yet, I’d like to test it on an array of 1.0s or something whose output I should know in advance. I’m currently getting some output, but I’m not sure if it’s the output of [osc~ 440] -> [dac~] or merely some other noise since the values are e.g.: 2.1230615182310281E-314 -1.4044477616124616E+306 …

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libpd: pdengine->openPatch() leads to Thread 1: EXC_BAD_ACCESS (code=1, address=0x28)
by Matti Viljamaa 19 Feb '16

19 Feb '16

I’m trying to test libpd out by merely having it read a patch with [osc~ 440] -> [dac~] I’m currently doing: pdengine = new pd::PdBase(); pdengine->init (/*NInChannels()*/ 0, 2, GetSampleRate()); patch = pdengine->openPatch("testpatches/sine.pd", "."); // audio processing on pdengine->computeAudio(true); and so on. The line: patch = pdengine->openPatch("testpatches/sine.pd", "."); gives Thread 1: EXC_BAD_ACCESS (code=1, address=0x28) on pdengine->openPatch() the testpatches folder exists at “." and contains sine.pd. What’s wrong?

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Burst of packets.
by Mario Mey 19 Feb '16

19 Feb '16

Hi, there. I'm working with MobMuPlat in Android and PureData in Linux. I use my MEH-SYSTEM (*1) and I'm having issues with packets loss. A buddy from a group suggested me to send "bursts of packets" instead only one packet... considering this packet as important. So, I imagine, if I send 10 messages with an unique ID (*2), instead of only one... I would know that even one message will arrive. I never worked with "bursts of packets"... not even understand well this type of messages. Could someone explain it to me... and/or give me some examples/patchs of how to do this? Thank you very much. PD: I'm using tablet to be wireless. That's the point. (*1): http://mariomey.com.ar/show/meh-system/ (*2): I imagine a random number to be send with the message. If it arrives and then, it arrives again with the same number, it will be blocked... Any other technique?

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[writesf~] problem
by S.E.P. 19 Feb '16

19 Feb '16

Dear List, When running the master stereo output of my patch into [writesf~ 2], I don't hear any crackling while running the patch itself, but I do hear it when I play back the .wav file (at the same volume). Looking at the task manager during the recording, I'm not exceeding 13% CPU or 31% memory usage. I've tried recording 16-, 24- and 32-bit .wav files. Otherwise, I can note that the sounds in question are contrabass sounds run through a [vcf_bpc~] filter. The crackling appears at the height of dynamic envelopes, although, according to the main window's monitor bar (and in-patch vu-meter), I'm not hitting the amplitude limit. Also, I'm using a step-wise cue-list to control the patch's progression by pressing the spacebar. Any idea what the problem might be? Thanks in advance, Elliot

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Pd-list February 2016