Pd-list December 2010

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120 participants
216 discussions

pidip camera settings high fps
by Jose Luis Santorcuato 30 Dec '10

30 Dec '10

Hello list, everything works, now I wondered if it was possible to change the size of the catch, I have a camera that captures from 640 to 1024, but low fps, I would like to capture at 30 fps and 640, catch smaller setear possible dimensions? with pdp_scale suffice? Best regards José -- http://arselectronicachile.blogspot.com http://comunicacionnativa.blogspot.com/ http://www.myspace.com/santorcuato

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understanding fexpr~ example
by ronni montoya 30 Dec '10

30 Dec '10

Hi Dear list, i was experimenting with the lorenz example that comes with the fexpr~ help file. Can anybody explain me how that example internally works? how is fexpr~ generating the waveform in this case? thanks in advance R.

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pd openembedded beagleboard-demo-image
by mark gross 29 Dec '10

29 Dec '10

I'm trying to get vanilla PD working on a beagle board using open embedded's angstrom-2010.x distro. I've hacked up a bit bake recipe (still a hack job) and the task-beagleboard-demo-image.bb to make a image that will actually run the PD GUI on a BB. My problem now is with the audio. I can't seem to get PD's audio + midi test to make any more than queuer counter noises. I've played with using OSS and Alsa, and disabling pulse from the build. aplay does play a 22050Hz mono-wave file. I get the following errors from PD when I attempt to run it as root: using OSS I get clicks from the test patch. Using Alsa I get a spike in cpu use and things get really sluggish. and I get -- tried but couldn't sync A/D/A ... I would like to get any debugging tips or advice possible to finish this project and post a howto (and perhaps add the puredata.bb recipe to OE) Thanks! --mark

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timing
by Dietrich Pank 28 Dec '10

28 Dec '10

Hi list, This is my first post here asking you for help. I built for many years in NI Reaktor (and still do). For this reason I'm used to handle basically 2 signal types: Audio - always sample rate clocked Event - any(!) time, even between samples Now I need to get to know and used to the clock and trigger "secrets" in pd. I want to work efficiently of course but also to be sample accurate if needed. Beside having fun with the great freedom and logic of puredata, my aim is to be able to build hi quality audio stuff sooner or later... While building an audio scope (for e.g. debugging) I got stuck in searching sample exact message trigger. I wanna ask you for suggestions tips about my approach. Have a look into attached pd I prepared with comments here and there describing my thoughts and problems. There may be different ways to make audio scopes (I know there is one build-in but it only displayed useless coarse vector lines) but some questions I want to get answered anyhow: my basic questions: * is it possible to get/fire precise timed messages, e.g. Metro (at least) Samplerate accurate? * is it possible to get sample timed events/messages, e.g. threshold what is far to coarse! (see attached pd) * regarding changing block~ size: - my patch only accepts 64 - why? - why does the $0-audioscope show extreme high amplitude when block~ size is <64 ? - makes it sense at all changing block~ size in order to get better message timing? Or what is it for... manuals, links, mails or commented pd patches - anything is welcome. regards Dietrich

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how to detect if array has changed
by Ivica Ico Bukvic 28 Dec '10

28 Dec '10

Is there anything in the API that offers ability to detect when an array has been changed and then act upon it? This would be quite useful when using array as a multislider to change values. If there isn't I am proposing providing an invisible send from array whenever it is changed with the name <array_name>_changed. It could also send exactly which element has changed. Likewise, for the same reason, I would like to provide clipping of the drawn items to the visible area but before I do so, is there a reason one would want to keep outside elements visible as well despite their distracting appearance? Ico

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Gridflow external cam os x
by Anas Ghrab 28 Dec '10

28 Dec '10

Hi all, I can't make the #camera working with Gridflow and a firewire cam on OS X. Do I need to install something specific ? Thanks, -- Anas Ghrab

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[PD-announce] many - a library for managing many instances
by Hans-Christoph Steiner 28 Dec '10

28 Dec '10

I finally got off my duff and put together this library I've been thinking about for years. After making my own nqpoly5, nqpoly6, nqpoly7, runmany, voicepoly, etc. I've tried to bundle all these techniques into a common library. Since this library is all about managing many instances of a Pd patch, I'm calling it 'many'. http://puredata.info/community/projects/software/many Objects in the 'many' lib are based on code from Steven Pickles' (aka pix) nqpoly4 and Frank Barknecht's polypoly. Thanks to pix's nqpoly4 because that was the real groundbreaking work that proved that a useful and reliable instance-managing object could be programmed in Pd. Frank then did the work to make it maintainable and hackable. .hc ---------------------------------------------------------------------------- Computer science is no more related to the computer than astronomy is related to the telescope. -Edsger Dykstra _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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[PD-announce] Piksel video report: Sonification of IT censorship technologies
by Marco Donnarumma 27 Dec '10

27 Dec '10

(sorry for x-post) Dear all, Piksel team just released a full video of my recent presentation in Norway for Piksel 2010. The talk focused on the current state of IT censorship technologies and a related sonification work titled Golden Shield Music ( http://marcodonnarumma.com/works/golden-shield-music/). If it could be of interest, please check the video at: http://blip.tv/file/4520632 Piksel team published many other videos related to the exhibition, performances and presentations hosted at Piksel 2010. You'll find many interesting projects on the Piksel blip.tv channel at: http://piksel.blip.tv/ (among the other projects you will also find the full video of UKI – a viral performance by Shu Lea Cheang with Martin Howse. Sonicscape with participation of Piksel10 artists Oscar Martin Correa, Marco Donnarumma, Joachim Montessuis, Alejandra Perez, Eleonora Oreggia, Julien Ottavi) Best wishes, -- Marco Donnarumma aka TheSAD Independent New Media Arts Professional, Performer, Teacher Ongoing MSc by Research, University of Edinburgh, UK PORTFOLIO: http://marcodonnarumma.com LAB: http://www.thesaddj.com | http://cntrl.sourceforge.net | http://www.flxer.net EVENT: http://www.liveperformersmeeting.net _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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Re: [PD] [PD-dev] how to detect if array has changed
by Jonathan Wilkes 27 Dec '10

27 Dec '10

If you clip, then you will no longer be able to tell the difference between an array wih values at max and min y and an array with y values that exceed the min/max y. Keeping outside elements visible gives visible feedback for patching errors that cause the outside elements.

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Re: [PD] [PD-dev] is there a way for an object to detect whethere its inlet is connected to something
by Mathieu Bouchard 27 Dec '10

27 Dec '10

On Mon, 27 Dec 2010, Ivica Ico Bukvic wrote: > BTW, I just encountered the crashes the other user reported before. I thought you had said that you had gotten GF to work... > Simply cannot create a single object without crashing Pd when gridflow > is loaded. Opening preexisting patches is ok, however. Using your g_canvas.h ? sounds like a t_widgetbehavior problem. > Backtrace gives nothing. I was wondering whether it can make a difference to compile both pd and GF with -O0 for backtracing, in cases where compiling one or the other with -O0 is not sufficient... I know that compiling with -O3 does remove hints that are necessary for backtracing, but I don't know what causes the backtracing problem you are talking about, although I do reproduce it. I don't remember how much I tried -O0 but I remember that it does make a difference in some other cases. > I also found really weird behavior when opening docs (like > doc_also-help.pd patch) where when running pd with -d 99 -d 99 is useless : -d 3 is the same as -d 99, because the argument of d is modulo 4. > it constantly draws and erases objects. That's an annoyance that has been there for a year in GF and that is climbing on my priority list because I am tired of it... especially because it prevents the debugging of certain problems (GF has problems with 0.43 too). > It has to do with how the doc bars are shown between edit and non-edit > modes as when I erase those thehy work fine. The redraw of various items is controlled by a [metro] inside of the [doc_h]. In itself, this redraw doesn't have directly to do with the editmode. > I also found out that I crash pd every time I do mouse-over over the > segmented patch cords that are connected to each paragraph of the doc > text. I didn't change the source code of pd's wire display : instead, it's a part of [gf/lol] that modifies the cables often enough so that the straight lines don't remain straight, but this involves only sys_vgui, not widgetbehavior. There's nothing in [gf/lol] that is related to mouseover in any way. However, widgetbehavior of the comment class is modified, as I said previously. This is done in [gf/lol]'s setup function, although it isn't directly dependent (it would be a better classification, to move that code to gridflow.cxx) > I suspect this may be something with the pd-l2ork iteration but am > unable to figure out what. temporarily disable the widgetbehavior hack and see what happens. However, that breaks most of the funny wires that are used in my helppatches anyway, so, it may not give us the hint we'd like to have. > At first it was rtext_erase and then rtext_senditup both of which had > t_rtext *x being 0x0. Now that I added additional checks there, it > appears glist_findrtext triggers consistency check (this is against > gridflow v.9.12). do you recommend any particular changes to gridflow ? did you find anything that I'm doing wrong ? > Is this all perhaps due to widgetbehavior matter you mentioned before, > or did the latest changes to the pd-l2ork tree cause additional issues? Dunno, I didn't try l2ork, and I know even less about the latest changes. _______________________________________________________________________ | Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC

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Pd-list December 2010