Pd-list September 2006

pd-list@lists.iem.at

139 participants
230 discussions

buffer overflow with pix_image
by user ＠ earweego 16 Sep '06

16 Sep '06

hello list, for an installation in ZKM, we are using a GEM-based patch where a dozen of cubes are textured via [pix_image] with jpg-images of 35kB on avg. each cube changes its image about once per second, and we are getting heavy crashes after less than an hour. using a MAC Dual G5 with OS X 10.4.4, 1.25GB RAM and PD version pd++_0_39_1 by James Tittle which is amazing for the rest - even fixed the tedious titlebar issue :) apparently, the image buffer is not cleared after the new image was loaded, and thus the RAM is overflowing. We could work around this problem by changing the images less often, but it feels dirty as it would just _delay_ the crash to a time beyond exhibition duration. Would it help if the images had smaller pixel sizes and thus take less memory? I guess the bug is known, but is anybody able to fix it before the opening in one week ? any hint would be greatly appreciated, bests, .hh.

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Computer Music feature reconsidered
by adam armfield 16 Sep '06

16 Sep '06

hi Ollie, just in case your new to this freelance journalism lark here's a bit of a handy guide... http://www.londonfreelance.org/feesguide/index.html (the rates & rights pages make for interesting reading) if you haven't talked about a contract with future publishing yet then i'd recommend doing so asap... i assumed it would be ok to leave it & have just had a very bad experience with them... also, their share price has dropped 25% in the last few weeks, this could mean they are about to go tits up (the good news is that i reckon you could licence your feature to another mag if this happens) all the best adam ___________________________________________________________ Does your mail provider give you FREE antivirus protection? Get Yahoo! Mail http://uk.mail.yahoo.com

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Re: [PD] FFT + dac~ delay issue
by Kyle Klipowicz 16 Sep '06

16 Sep '06

I know, it really demystifies the whole Uncertainty Principle haze of confusion. After learning that it's just a result of tradeoffs with mathematical measurements, it doesn't seem like such a deep and powerful revelation of the universe. Good thing we can still be baffled by String Theory. ~Kyle On 9/15/06, Jarbas Jacome <jandila(a)gmail.com> wrote: > Hello! Hey thank you for this reference to Hisenberg principle! Very excite!!! > I never attempted to this relation. Now, finally I understand the > principle better hehe > thanks > j.jR. > > On 9/15/06, Kyle Klipowicz <kyleklip(a)gmail.com> wrote: > > Hi Daniel~ > > > > It sounds like you're trying to use the phase vocoder, which is a bit > > different than the Kraftwerk-style vocoder. I may be wrong about > > that. But you shouldn't have to use a FFT to do vocoding in this > > style. > > > > The traditional vocoder model takes a bank of tuned bandpass filters > > to detect amplitudes across the modulator spectrum, and then use these > > amplitudes to drive another set of bandpass filters to shape the > > spectrum of your carrier signal. > > > > Tom Erbe of UCSD has a nice example patch that will probably be more > > of what you want to do. You can download it here: > > http://music.ucsd.edu/~tre/171/w8a-vocoding.pd , and see more cool > > things from the course that he teaches at his site: > > http://music.ucsd.edu/~tre/ . > > > > BTW, the reason that you must use certain blocksizes for FFT work is > > that the FFT actually operates on signal vectors, transforming a > > fixed-time amplitude vector into a fixed-time frequency vector. You > > could do a FFT on a 64-sample signal vector (Pd's native blocksize), > > but its resolution would be pretty crappy, so that's why its better to > > use a larger block size. (This whole concept is actually the root of > > the Heisenberg Uncertainty Principle > > [http://www.newtonphysics.on.ca/HEISENBERG/Chapter3.html], since > > better time resolution gives worse frequency resolution, and vice > > versa.) > > > > I hope that helps! > > > > ~Kyle > > > > On 9/15/06, mami music <mami.music(a)gmail.com> wrote: > > > Hi all i made a vocoder which spectrum is borrowed from an FM synth and the > > > amplitude is from the line lin through an adc~. > > > I have not been able to make it work completely in realtime. I´ve tried some > > > stuff and it´s still with latency. How can i make it work real time? (my > > > soundcard is an m-audio firewire 4-10) > > > > > > what ive tried: > > > Basicly i have used the audio configuration and placed the latency value to > > > 0:seems to mess up the dsp and work bad. The lowest latency i´ve got to > > > achiev without damaging the audio is 50 ms. > > > The vocoder process i borrowed from one of the FFT examples included in PD > > > extended. I have tried to change the settings of the block~ object in the > > > subpatch that does all the vocoder+fft processing, but still nothing. > > > > > > can anybody give me a hint and also refresh the relationshib between block~ > > > and all the fft process being made there? > > > > > > thankz! > > > > > > daniel > > > > > > > > > _______________________________________________ > > > PD-list(a)iem.at mailing list > > > UNSUBSCRIBE and account-management -> > > > http://lists.puredata.info/listinfo/pd-list > > > > > > > > > > > > > > > -- > > > > http://theradioproject.com > > http://perhapsidid.blogspot.com > > > > (((())))(()()((((((((()())))()(((((((())()()())()))) > > (())))))(()))))))))))))(((((((((((()()))))))))((()))) > > ))(((((((((((())))())))))))))))))))__________ > > _____())))))(((((((((((((()))))))))))_______ > > ((((((())))))))))))((((((((000)))oOOOOOO > > > > _______________________________________________ > > PD-list(a)iem.at mailing list > > UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list > > > -- http://theradioproject.com http://perhapsidid.blogspot.com (((())))(()()((((((((()())))()(((((((())()()())()))) (())))))(()))))))))))))(((((((((((()()))))))))((()))) ))(((((((((((())))())))))))))))))))__________ _____())))))(((((((((((((()))))))))))_______ ((((((())))))))))))((((((((000)))oOOOOOO

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file extension
by Romain Vuillet 16 Sep '06

16 Sep '06

Hello list, does anybody knows how to get the file extension on an openpanel? Thank you

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2007 Spark Festival Call for Works (Minneapolis, MN USA)
by Michael Berkowski 15 Sep '06

15 Sep '06

Hi all, the due date is nearing, but this will interest many of you. The Spark Festival of Electronic Music and Art is a highly eclectic festival held annually at the University of Minnesota. It differs tremendously from most other university festivals in the USA, welcoming all styles of electronic music and arts for concert hall, gallery, and club performances. Please direct inquiries to sparkfst(a)umn.edu, rather than to me. Best wishes, Michael Berkowski http://www.berkowski.net/ ----------------- Apologies for cross postings... call also attached as PDF... University of Minnesota School of Music, Noel Zahler, Director Announces 2007 Spark Festival of Electronic Music and Art Douglas Geers, Director West Bank Arts Quarter, University of Minnesota Twin Cities Campus Minneapolis, MN February 20-25 CALL FOR COMPOSERS, ARTISTS, and PRESENTERS Submission Deadline: September 30, 2006 (postmark) The University of Minnesota School of Music is proud to present the 2007 Spark Festival of Electronic Music and Art, February 20-25. The festival will be held on the Minneapolis campus of the University of Minnesota (USA) and neighboring Minneapolis performing arts venues, and will feature guest artists Morton Subotnick, Richard Devine, and others to be announced. Now in its fifth year, the Spark Festival showcases the newest groundbreaking works of digital music and art. Last years festival included innovative works by over one hundred international composers and artists, including featured guest artists Alvin Lucier and Scanner. Leading scholars and technology specialists also presented papers relating to new technology and creativity. Audiences for the concerts, installations, and lectures last year totaled approximately 4,000 people and garnered multiple mentions in local and national media. Spark invites submissions of art, dance, theater, and music works incorporating new media, including electroacoustic concert music, experimental electronica, theatrical and dance works, installations, kinetic sculpture, artbots, video, and other non-traditional genres. Spark also invites submission of scholarly papers on Collaborative Arts, Interactivity, Cognition, Compositional and Artistic Process, Social and Ethical Issues in the Arts, Art, Music, Video, Film, Animation, Theater, Dance, Innovative Use of Technology in Education, Scientific Visualization, Virtual Reality, intermedia composition, performance, human-computer interaction, software/hardware development, aesthetics, and history and alltopics related to the creation of new media art and music. All accepted papers will be published as part of the Spark proceedings. Please see http://www.spark.cla.umn.edu/media.html for a PDF copy of the Spark 2006 proceedings and program. MUSIC SUBMISSIONS Music submissions will be accepted in four categories: 1. Concert works: Interactive works for acoustic instruments and electroacoustics (performance forces are available, TBA) Electroacoustic works with and without performers. Performance venues will accommodate 2-8 channel works and works with video. Although there is no strict limit of duration, pieces of fifteen minutes or less are encouraged. 2. "Spark Nitelife: Experimental electronic performances in a "club-style" venue. Performers of various styles will be considered, including those influenced by IDM, hip-hop, glitch, jazz, and etc. Selected performers will be given sets of 15-30 minutes. Performance venue will accommodate stereo sound and video. 3. Installations: [See "Art Works" below] 4. Music with video [See Art Works below] ART WORKS Submissions will be accepted in three categories: 1. Installations and gallery works: A number of installation and gallery exhibitions will be mounted in various spaces on the UMN campus, including the Weisman Art Museum. Please include technical and space requirements with submission. Installations may be physical objects, video and/or sound projections, or combinations thereof. Artists may be required to provide some or all of necessary technology to mount installations. 2. Video: Experimental video works will be screened at multiple Spark events. Videos featuring digital music compositions (two-channel or Dolby 5.1) are welcome, but this is not required. Although there is no strict limit of duration, pieces of twelve minutes or less are encouraged. Please submit on DVD (NTSC) or DVD data disk in mpg, mov, or avi file format. 3. Theater/Dance: A number of theatrical and dance works incorporating new technologies will be programmed at Spark 2006, with a special interest in shorter works that can be integrated into programs with music and video works. In addition, although not confirmed as of this writing, we hope to produce at least one performance in a dance theater with video projection and an Internet 2 connection. Please include performance venue and technical requirements with submissions. PAPERS Technical papers, lecture/demonstration, and workshop submissions that deal with topics relating to creating arts and music with new technology are encouraged, including Collaborative Arts, Interactivity, Cognition, Compositional and Artistic Process, Social and Ethical Issues in the Arts, Art, Music, Video, Film, Animation, Theater, Dance, Innovative Use of Technology in Education, Scientific Visualization, Virtual Reality, intermedia composition, performance, human-computer interaction, software/hardware development, aesthetics, and history. Paper presentations will consist of a twenty-minute presentation and five minutes of Q/A, and all accepted authors must attend to present their papers. Submissions should consist of a two-page abstract with bibliography. Camera-ready papers will be due on November 1, 2006. Individuals may submit a maximum of one paper and one lecture/demonstration, and these will be submitted online. More information about the submission process will be available soon on the Spark 2007 website when the online submission procedure has been activated. All accepted papers will be published as part of the Spark proceedings. SUBMISSION REQUIREMENTS Applicants are invited to submit one work per category in up to three categories for consideration. All applicants must complete an online submission form on the Spark Festival website and include their submission number(s) with any physical media sent via postal mail. The submissions website will be at http://spark.cla.umn.edu/submissions.html and will be activated in late August. More details about the submission process will be available on the Spark 2007 website when the online submission procedure has been activated. Regarding music and other performance works: Performing resources will be drawn from the University of Minnesota and Twin Cities area musicians. However, availability of musicians will be taken into consideration when selecting works, and therefore applicants are encouraged to bring their own performers when possible. More information about available performers will be posted on http://www.sparkfestival.org when the online submission procedure has been activated. Composers and artists whose works are selected for inclusion are strongly encouraged to attend the festival. Scholars whose papers or demonstrations are accepted will be required to attend Spark to deliver their presentation. TECHNICAL DETAILS Selected works will be announced by November 1, and travel and accommodations information will be posted on http://www.sparkfestival.org by the same date. Submission deadline is September 30 (postmark). More information and the online submissions procedure will be posted soon on the Spark 2007 website at http://www.sparkfestival.org. Questions can be directed to the Spark hosts at sparkfst(a)umn.edu .

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Arduino : pduino digital outs ?
by tim 15 Sep '06

15 Sep '06

I uploaded the firmware 'Pduino modified by dmorelli' to the arduino then open pd patch 'arduino-help.pd' (see attachment) All I can get to work is analog ins. can't get a led to blink the subpatch 'sendig digital outs' contains an abstraction or object named 'bytemask', wich i don't have... could this be the problem? if yes, what/where is [bytemask] ? thanks! Tim

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Arduino
by B. Bogart 15 Sep '06

15 Sep '06

Hey all, I just started a little wiki guide showing my experience with learning the arduino on linux. https://www.pure-data.info/Members/bbogart/Arduino The page is just starting as a log of what I have been doing in my learning process but It will grow into a proper document and end up as part of PDDP. comments welcome. .b.

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FFT + dac~ delay issue
by mami music 15 Sep '06

15 Sep '06

Hi all i made a vocoder which spectrum is borrowed from an FM synth and the amplitude is from the line lin through an adc~. I have not been able to make it work completely in realtime. I´ve tried some stuff and it´s still with latency. How can i make it work real time? (my soundcard is an m-audio firewire 4-10) what ive tried: Basicly i have used the audio configuration and placed the latency value to 0:seems to mess up the dsp and work bad. The lowest latency i´ve got to achiev without damaging the audio is 50 ms. The vocoder process i borrowed from one of the FFT examples included in PD extended. I have tried to change the settings of the block~ object in the subpatch that does all the vocoder+fft processing, but still nothing. can anybody give me a hint and also refresh the relationshib between block~ and all the fft process being made there? thankz! daniel

2 1

active and tot not right in pd-extended
by Chuckk Hubbard 15 Sep '06

15 Sep '06

I can't get the cyclone object [active] to do anything in 0.38.4-extended-RC8. [tot] does work, but I had to manually copy tot.dll from the toxy folder to extra. This isn't a problem for me, but for the folks to whom I've distributed my patch. Anyone know what happened? -Chuckk -- "Far and away the best prize that life has to offer is the chance to work hard at work worth doing." -Theodore Roosevelt

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dealing with large sound files
by Nicholas Ward 15 Sep '06

15 Sep '06

Hi, Im not sure whether PD is actually the write software for this but anyhow maybe you might have some suggestions, I have 16 audio files that are 28 minutes long each. I need to keep them looping and in sync to a counter that is looping through the frames of a movie in GEM. I can use separate machines for the GEM and audio but they must stay in sync. I also dont reckon I'll be able to load 16 28min sound files into tables due to RAM constraints. Does anyone have any suggestions. Is there a way to play the soundfiles from disk and drive the frame counter in sync. IF you had any suggestions of ways to do this outside of PD that would be fine too but I'd still need some way to talk to my GEM patch. Thanks Nick

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Pd-list September 2006