Pd-list December 2011

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80 participants
108 discussions

[PD-announce] Hypo Chrysos - Premiere of a new biomedia performance, Matadac Fest
by Marco Donnarumma 14 Dec '11

14 Dec '11

(sorry for x-post) Dear all, this is to cordially invite you to the premiere of my latest work titled "Hypo Chrysos". It is a new biomedia performance for enhanced body, interactive multi-channel sound and video (purely Pure Data-based). WHEN & WHERE: Friday 16th December h 20.00 Auditorium, CaixaForum, Madrid. Following, Herman Kolgen will perform his work "Inject". ~~~~~~~~~~~ Hypo Chrysos is the second piece of a series of bio-interactive works based on the Xth Sense (XS), an open, biophysical and wearable technology I've recently developed. The work was composed ad hoc for the Matadac festival in Madrid, which this year explores the theme of Machines and Flesh. In conjunction with this premiere, I'm teaching a workshop on biophysical generation and control of music and video using the Xth Sense tech. Hypo Chrysos: http://marcodonnarumma.com/works/hypo-chrysos/ Xth Sense: http://marcodonnarumma.com/works/xth-sense/ XS Workshop: http://marcodonnarumma.com/teaching/xth-sense-biophysical-music/ Matadac Festival: http://www.madatac.es/ Hope to see some of you there, best wishes, -- Marco Donnarumma Independent New Media and Sonic Arts Practitioner, Performer, Teacher ACE, Sound Design MSc by Research (ongoing) The University of Edinburgh, UK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Portfolio: http://marcodonnarumma.com Research: http://res.marcodonnarumma.com | http://www.thesaddj.com | http://www.flxer.net Director: http://www.liveperformersmeeting.net _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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sending command lines with pd (windows)
by Patrice Colet 14 Dec '11

14 Dec '11

hello, I'm trying to get rtsp streams that would be processed with pd. One simple solution is about using mplayer through command line from pd. with popen: I had to get an old popen external for doing this because the last release doesn't work on windows vista. The problem I'm getting is that I'd like to tell with pd message in [popen] to stop mplayer, and then process the recorded stream, but I couldn't send anything with pd until mplayer haven't finished it's task. I've tried to use "timeout" command, it only work by launching the script from cmd, but not from [popen]. with netsend: So I tried use a cmd console to launch pdreceive for receiving the rtsp service number, and then launch mplayer but I don't get the trick to do it, that's what I've been trying: >pdreceive 5555 udp | myscript.bat myscript.bat content: start mplayer -dumpstream -dumpfile ../stream/out.avi rtsp://mysite.fr/tv/stream?namespace=1&service=%1&flavour=sd Is there an external for streaming rtsp? Colet Patrice

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Phase Vocoder issues
by Alexandre Torres Porres 14 Dec '11

14 Dec '11

Hi there, how's everything? I sent this other remark to the pd-list the other day, no replies, maybe I should insist with you. It's about the time parameter for [line~], which doesn't need to be that, and just seems to have to not be too slow, windows and overlap will reconstruct it, and even if that parameter is ridiculously fast, it doesn't matter. Now I also found other issues on the implementation in I07; you perform a normalization at a first stage on the previous FFT output. I thought about it and assumed it's not necessary. So I took it out, and it still sounds equally fine. And on the normalizaion section, "salting" the signal with a small amount (such as 1e-15) in the case of zeroes, prevents division by zero, and gives a magnitude of 1, but will give you a phase shift that is not "zero". So I thought of another way with [expr~] that outputs magnitude of 1 and 0 phase. Anyway, I'm updating that into my computer music examples with Pd, and any remark you should have is welcome. Thanks Hope you have a well deserved holiday's season of rest and peace. alex 2011/12/11 Alexandre Torres Porres <porres(a)gmail.com> > Hi there. I've been opening the guts of the phase vocoder patches for a > while now, and rewriting them, having it in new forms, etc... > > And... today I had this doubr. You see, lets have the regular I07 example. > Now, we feed [line~] objects with where to start and where to go in a time > specified as the FFT analysis Hop size in ms. > > I was wondering if that wasn't just too fast. And why wasn't the time for > [line~] the actual window size in ms. That is because I assumed this > [line~] controlled somehow the speed playback we hear. > > So I put a number box and started messing around with it, making it a > bigger time lenght and hoped to listen to some sound change (maybe speed), > just for fun. To my surprise, nothing happened!!! That is until I reached > two overlaps (1024 points instead of 512). > > So instead of making anything clearer than it was, it got pretty much more > weird. I decreased the values until reaching a supidly small time inteval > of micro ms, something like 2.26e-07, and it still worked!!! > > I now have the clear idea that this length in ms is not that important at > all. But that it has to be fast just to make line output the audio so it > gets in the FFT. If it takes to long (2 overlaps or longer) it ruins > everything. But what really controls the thing is the time interval defined > by the counter which is controlled by the speed parameter. > > [line~] needs to feed the [tabread4~] output at a rather free way. > > Anyway, some nerdy remark. I'd like to understand this better, and explain > this better in my rewriting of the patches. > > Thanks > Alex >

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Problems installing pd-extended 0.42.5 on Ubuntu 11.10
by Antonio Roberts 13 Dec '11

13 Dec '11

After upgrading to Ubuntu 11.10 I'm trying to install pd-extended 0.42.5 on (installing 0.43 works fine but is still a bit buggy). when trying to install I get this error: "Dependency is not satisfiable: libquicktime1 (>= 2:1.1.1+debian)" Did a bit of research and found that libquicktime1 has been replaced by libquicktime2, hence why it's not installing. tl;dr: How can I install pd-extended on Ubuntu 11.10? Thanks for any help, Antonio -- ============================ antonio(a)hellocatfood.com http://www.hellocatfood.com ============================

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Networking patches to utilize multiple cores
by onyx＠onyx-ashanti.com 13 Dec '11

13 Dec '11

Greets. Is there a proper or preferred method for using any of the networking objects in pd-extended to allow for realtime bi-directional communication between patches on the same computer, so as to utilize 2 or more cpu cores? I am currently trying to discover the best way to handle this. i started with netsend/netrecieve and used [route] to send approximately 40 or so streams as messages, and it worked, somewhat, but I think i may have been squeezing too much data through that one netsend as it was a bit sluggish (running on a dual core thinkpad 1.83ghz, 3gb ram). I am working with 2-5ms latencies so sluggish can screw me up in performance, especially since i havent even added 60% of the data that will be streaming from my "messages" patch to my "signals" patch. I am looking at netserver/netclient and contemplating breaking the streams up into 2 or more clients but i wanted to see if anyone had any advice in this regard. the goal is to have a "messages" patch that would interpret all the incoming sensor and performance data, send it to subpatches for GEM visualizations, interpretive synth controls and looping system parameters, THEN, send that data to a separate patch that would house around 15 signal object based subpatches for synthesis, looping and effects. any status feedback i need from the signal objects would need to be sent back to the messages patch for processing and display, so a realtime, bi-directional solution is very important. insight? Onyx -- www.onyx-ashanti.com

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[gemwin] - Storing window-shots and changing view?
by Sebastian Valenzuela 13 Dec '11

13 Dec '11

Hi everyone, I have two big questions regarding the graphics object [gemwin]: How does one change the focus of the graphics window? For example, we are using a computer video camera to look at the surface of a pepperoni pizza (in real time), but i want to change the view so that all you see is one pepperoni slice in the graphics window (still a square window/image). Also, How does one go about temporarily storing an image/frame of the live video going through the graphics window object? For example, now that i have the piece of pepperoni in view, i want to capture ONLY this portion of the entire pizza/live video stream. I am new to [gemwin], but would like to implement it into an audio/video installation due next week. Any help would be greatly appreciated! Thank you so much for your time, Sebastian

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Re: [PD] [spectrogram~] won't show anything
by katja 12 Dec '11

12 Dec '11

On Thu, Dec 8, 2011 at 12:27 PM, Caio Barros <caio.barros(a)gmail.com> wrote: > >> This bug in [sqrt~] was reported on the list some time ago. It is in >> nightly builds of Pd-extended 0.43.1. There is a bug report on the >> bugtracker. Consider adding a comment there with the build details. >> >> >> http://sourceforge.net/tracker/?func=detail&aid=3442082&group_id=55736&atid… >> > Done! In the meantime, you could use [pow~] with exponent 0.5. But, while I'm typing this and check if it's true, I notice that [pow~]'s arguments are swapped again. In 0.42.5 it was finally matching [pow] (base at left inlet and exponent at right inlet, so you can also type the exponent as init argument) and now it's back again the 'wrong way round'. What could be the rationale behind this? In vanilla 0.43.1test5 it is 'the right way round', with exponent at the right inlet. But in vanilla, [pow~]'s init argument is ignored without warning. Two more buglets to be reported and fixed... Katja

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Re: [PD] [spectrogram~] won't show anything
by João Pais 12 Dec '11

12 Dec '11

[first, if you don't reply to all, the list doesn't get the messages] > Yes but as I said there is no package for ubuntu 11.10 that I'm aware. On > the other hand the official package there are a lot of libraries for > download in the official repository and I can almost remake the > pd-extended > version. The only problem is that the packages do not configure pd > automatically to load the libraries. did you look in http://autobuild.puredata.info/auto-build/latest/? maybe it's better you try it first.

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extended -> vanilla
by Jean-Christophe Sekinger 12 Dec '11

12 Dec '11

Hello Is there somewhere _abtractions_ of most popular pd-extended _objects_, for vanilla (f.e. from zexy, iemlib, or other librairies?) -- Jean-Christophe

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Re: [PD] pd at startup creates 2 canvases, why?
by Ivica Ico Bukvic 12 Dec '11

12 Dec '11

> The OS releases all the memory allocated by the process when it > terminates, so no. OK, however, in pd-l2ork I am currently building infinite undo which will be a doubly-linked list linked to a canvas. So, if I am going to instantiate it dynamically, once the program exits are all these dynamic things taken care of? I think not. Otherwise, why would we need destructors in the first place if the os takes care of it all (other than eventually running out of memory)? Even vanilla canvas has dynamically allocated list that is destructed upon closing the patch but this is not the case with the two invisible canvases...

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Pd-list December 2011