Pd-list April 2005

pd-list@lists.iem.at

141 participants
255 discussions

freeframe video fx on pd?
by lalo 29 Apr '05

29 Apr '05

hi guys! i'm doin' some experiment with video... since i am on windows my only choice is the Gem (great) library.. afaik pdp, pidip and gridflow doesn't run on windows so my only choice is Gem. When i was testing vvvv ( vvvv.meso.net ) i saw it can loads Freeframe video effects ( http://freeframe.sourceforge.net/ ). Is there any running project to implement freeframe in Gem/Pd? or any project in porting on windows pdp/pidip/gridflow? thanx lalo -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.10.4 - Release Date: 27/04/2005

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pd running nuts
by Marius Schebella 29 Apr '05

29 Apr '05

my pd just froze when I did the following: 1 create a subpatcher pd sub 2 ctl+1 for a new object, but donÅ½t type anything in the box (only right click into the canvas) 3 rename the subpatch to an unknown object (trtrtrtrtrtrtrt sub) voilÃ¡! : ) that is with 0.37 and win XP. m.

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pd-cyclone
by Carlos Pita 29 Apr '05

29 Apr '05

Hi! Do you know where can I find the debian pd-cyclone package mentioned in the pd faq? It's not included in any debian distro (stable/unstable/testing). Thank you. Regards, Carlos

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[hid] segfaults
by Hans-Christoph Steiner 28 Apr '05

28 Apr '05

So I got my laptop running on a 2.6 Linux kernel last night and tried to reproduce the segfaults that people have been having. I tried all my devices and was not able to cause a segfault. (I have a Logitech Wingman Force 3D joystick, a Saitek Cyborg 3D Force joystick, a Microsoft IntelliMouse 5-button Optical mouse, a Logitech iFeel mouse, a Belkin Nostromo n30 gaming mouse, and my PowerBook's trackpad.) My devices also deliver a flood of 'syn' events, that part of the Linux input event system as of 2.6 kernels. But it all seems fine. By the way, in the new release, I removed the timestamp since Pd's float is too small to fully represent it (its a really bit int) and I don't think its very useful in this context anyway. Maybe that contributed to the segfault? I am going to look thru the bug reports again and see if I can think of anything. .hc ________________________________________________________________________ ____ "Information wants to be free." -Stewart Brand

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compiling the VASP external
by Matt Diamond 28 Apr '05

28 Apr '05

I'm having a bit of a problem compiling the objects for the VASP external. I'm using Pd on Windows XP, and it seems that VASP only comes with a makefile for use with Microsoft Visual C++. However, all I have is the Borland C++ compiler. Is there a simple way for me to install the external with what I have? My programming skills are a bit lacking, so I don't know how to work around this. Any help would be appreciated.

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Re: [PD] Granular Synth
by Spencer Russell 28 Apr '05

28 Apr '05

On Wed, Apr 27, 2005 at 09:02:40PM +0200, julien.breval(a)tremplin-utc.net wrote: > > you should use |vd~| or |delread~| rather than |tabread4~| (this one is for > reading in |array| or |table|) thanks for the tip. It's working much better now. :) > > to get a granular effect, change the delay time just before you > trigger the amplitude envelope; you can omit the amplitude > enveloppe but it's good for fragmenting sounds (some people > also add a synchronized filter and/or a pitch shift) most of > the time, the enveloppe lasts between 10 and 100 ms; you can > use constant or variable enveloppe times (you can also add a > random density parameter for the "trigger enveloppe" event) > > use some feedback too if you want to get more complex > fragmented things > > to remove the doppler effect, there are two basic methods: 1. > use a sample and hold, like in the sampler.transpose.pd example > by Miller Puckette (this method is rather suited to constant > enveloppe time / synchronous granular synthesis; the whole > granulator is scheduled by a single |phasor~|) OK, so using a samphold~, phasor~, and vd~, I've got the envelope-less granulator going, but how do I trigger the envelope with sub-block accuracy? I can use vline~ create the envelope itself, but getting it started is the problem. -spencer

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New feature for pix_buffer
by Florian Grond 28 Apr '05

28 Apr '05

Dear List, I recently started programming my own GEM externals. Since I use windoze I don't know what all the features of the other externals available for OSX and Linux are. We have added to the pix_buffer object the feature that the buffer can be used as a cyclic buffer, sending the message cyclic 1/0. Like this it would be easily possible to track the last x frames from a movie or a cam. If anybody would be interested in this feature I would be happy to pass on the sources, yet I don't know how to integrate it to any CVS etc. In case this feature is needed just write me, Florian

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Re: [PD] gridflow for pd OS X
by Burt 28 Apr '05

28 Apr '05

Sweet! Gridflow works now! I had to copy gridflow.pd_darwin into my OS X app. I also had to move by hand gridflow.bundle into /usr/lib/ruby/1.6/powerpc-darwin7.0 . Thanks for the advice. sburt

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Re: [microsound] image to sound conversion software
by derek holzer 28 Apr '05

28 Apr '05

I think any discussion of "transcoding" image (or other data) into sound has to take into account that such mapping is purely subjective. The artistry is in finding meaningful transpositions from one medium to another. Using "raw" data as sample values is certainly one way, and using an image as spectrographic values for resynthesis is certainly another. There are certainly enough softwares out there that do either trick, and those sounds are familiar to us from the many many artists who have used those softs already (to death in some cases). Dig a little deeper and decide for yourself the relationship of pixel to sample instead of relying on other people's ready-mades and you might be on to something new. Anyway, I'll be giving a workshop with Sara Kolster on PD and GEM in Bergen Norway next month, and one facet of that workshop is the relationship of (moving) image to sound. Emphasis will be placed on direct connections between sound and image through three different methods: influence of sound on image, influence of image on sound and the use of common "control data" for both image and sound. Full text has been posted on the Microsound-announce list: http://or8.net/pipermail/microsound-announce/2005-April/000080.html derek -- derek holzer ::: http://www.umatic.nl ---Oblique Strategy # 175: "What are the sections sections of? Imagine a caterpillar moving"

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Call: VisibleSound/AudibleImage workshop @ BEK
by derek holzer 28 Apr '05

28 Apr '05

VisibleSound/AudibleImage is a workshop and performance series by Derek Holzer and Sara Kolster which focuses on the interrelation of sound and image. The workshop component is a four day overview of Pure Data, GEM and PDP, a collection of Free + Open Source Softwares available for Linux and Mac OSX 10.3 which allow image, sound and data to be synthesized and manipulated in the same environment. Participants will learn the basic "grammar" and "vocabulary" of Pure Data, upon which objects for sound, 3D and video will be added. Emphasis will be placed on direct connections between sound and image through three different methods: influence of sound on image, influence of image on sound and the use of common "control data" for both image and sound. Time: 24. - 28. may 2005 Place: BEK, C. Sundtsgt. 55, 5004 Bergen, Norway Free participation. To apply send a short CV to bek(a)bek.no before 16. may. Workshop Details: *DAY ONE 1) Introduction: Why PD & Why Free + Open Source Software? Our decision to use Pure Data has been motivated by several factors. First and foremost is the need for a modular environment where audio and video processing is possible without the intrusion of negative elements such as a predetermined Graphical User Environment, cross-platform issues and restrictive licenses. We will discuss these issues, and why it is more important than ever that artists take Free + Open Source Software seriously as tools for creative expression. 2) Installation Clinic The first part of the workshop will be devoted to installing Pure Data, GEM, PDP and several other externals on the participants' computers. Mac OSX 10.3 and most Linux distributions can be accomodated. While PD and GEM support Windows, PDP and several other externals do not, so Windows users will be encouraged to use a live Linux CD such as Dynebolic during the workshop. (If V2 provides any machines of their own to work on, these will be set up on the previous day.) 3) Pure Data as a Language Like learning any new language, PD starts with learning vocabulary and grammer. In this case, we will learn the names of many common objects and the syntax of how to use them, in a clear "Geek-to-English" translation which makes the complex data-flow operations of PD understandable to non-technicians and artists. 4) Pure Data for Sound Synthesis PD has powerful signal-processing abilities, and we will explore these by building a simple, monophonic synthesizer controllable from either a MIDI device or from the keyboard of your computer. Different types of sound sythesis, such as Additive, Subtractive, Amplitude Modulation, Frequency Modulation and Wavetable Synthesis will be covered, along with the use of filters and delays for a variety of effects. *DAY TWO 1) Pure Data for Sample Manipulation Because PD uses a range of very basic building-blocks to store and playback sampled sound, a wide range of manipulations are possible. Here, we will explore pitchshifting, time stretching, looping and basic granular synthesis. Other uses of data stored in tables for control purposes will also be touched on. 2) Pure Data for 3D: GEM GEM is an external library used in PD for moving 3D graphics under the OpenGL protocol. It is also an ideal environment for VJ mixing. We will explore how to create and manipulate simple 3D objects, how to texture them with images, how to playback and mix video clips in GEM and how to use a live camera input. 3) Pure Data for Physical Modelling: PMPD PMPD is an external library for PD which allows the creation of physical models, consisting of units of mass and force, which can be used to control both sound and image. We will look at different examples of physical modelling using the sound-processing of PD as well as 3D graphics from GEM to sonify and visualize our "virtual objects". *DAY THREE 1) Pure Data for Audio Analysis We continue our investigation of the audio side of Pure Data by looking at different methods of analyzing sound signals for pitch and amplitude information. The data we extract from the audio can be used to either (re)synthesize new sounds or to control 3D or video graphics manipulations. 2) Pure Data for Video: PDP PDP (Pure Data Packet) is another external library in PD which is used primarily for video playback and effects filters. We will investigate PDP for direct video synthesis, for the playback and mixing of (audio)visual clips and for the processing of a live camera input. PDP includes several tools for the analysis of video for movement, change and color, which in turn can be used to control sound playback and other events in PD. *DAY FOUR 1) Pure Practical Examples Now that the workshop participants have the background to understand more complex PD patches, we will spend the morning looking at various demos and performance patches to see how different artists and programmers have developed their own environments for live audiovisual synthesis. 2) Pure Data Practice Workshop participants will put what they have learned into practice by working in small groups, pairing sound artists together with video artists to create simple audiovisual performance tools, with an emphasis on the interrelation of sound and image. *DAY FIVE 1) Workshop Presentation Public presentation by instructors and workshop participants of tools created during the week, covering the importance of Free + Open Source Software, as well as the practical examples of its use. Links: http://www.audibleimage.nl http://www.puredata.info http://www.bek.no http://flux.bek.no/int/www_docs/projektor/aktiv/visiaud -- +---gif(a)bek.no +47329234+4790665018c.sundtsgt.55,5004bg. www.bek.no/gif ---+ http://mob.bek.no -- derek holzer ::: http://www.umatic.nl ---Oblique Strategy # 83: "How would someone else do it?"

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Pd-list April 2005