Pd-list August 2006

pd-list@lists.iem.at

131 participants
259 discussions

testtone.pd: little 'bug'
by Roman Haefeli 24 Aug '06

24 Aug '06

hi all, hi miller <not very important> i just discovered a rather tiny 'bug' in testtone.pd. the first six [r~ tone-osc] are created _before_ and the last two _after_ [s~ tone-osc]. this leads to a one-block-delay between them. for some testing reasons, it would be nice, if they all would be in phase. </not very important> roman ___________________________________________________________ Der frühe Vogel fängt den Wurm. Hier gelangen Sie zum neuen Yahoo! Mail: http://mail.yahoo.de

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Definition of "scalar" in data structures
by David Powers 23 Aug '06

23 Aug '06

Hello, maybe this is a dumb question, BUT one thing that has always confused me, in trying to learn data structures, is the definition of the term "scalar". I never learned this term in any computer programming before. Anyway, here is how wikipedia defines it: "In computing, a scalar is a variable or field that can hold only one value at a time; as opposed to composite variables like array, list, record, etc.. In some contexts, a scalar value may be understood to be numeric. A scalar data type is the type of a scalar variable. For example, char, int, float, and double are the most common scalar data types in the C programming language." Ok, so far so good. Except, as far as I can tell, a "scalar" in PD is a composite variable, right? If I make [struct structure_01 float x float y float k] there are three variables there, not one. Am I missing something? As far as I can tell, a scalar is to a PD structure, as an instance is to a class definition in OOP. Is that right or way off? Appreciate your comments on this. Thanks! ~David

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feedback detection
by Hans-Christoph Steiner 23 Aug '06

23 Aug '06

Has anyone done anything with trying to detect feedback in a signal? I am not looking so much for feedback suppression techniques, but rather detection techniques. I am working on a system that has a slow feedback loop. I want to detect when feedback is the dominant part of the signal, and make the system respond in novel ways. .hc

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Trying to play a movie with GEM/pd
by Javier García 23 Aug '06

23 Aug '06

Hi! i have just have made this patch (enclosed), but it shows a completely black window. No problems to see a single .jpg. Windows XP and Quicktime installed. Javi

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Re: [PD] Colored (fractal, 1/f^a) noise generator for PD (fwd)
by Mathieu Bouchard 23 Aug '06

23 Aug '06

this was supposed to go to the list. ---------- Forwarded message ---------- Date: Mon, 21 Aug 2006 01:10:13 +0200 From: jose manuel berenguer <jmbeal(a)telefonica.net> To: Mathieu Bouchard <matju(a)artengine.ca> Subject: Re: [PD] Colored (fractal, 1/f^a) noise generator for PD El 20/08/2006, a las 20:58, Mathieu Bouchard escribió: > On Sun, 20 Aug 2006, Charles Henry wrote: > >> 1/f^a noise is a fractal because it is self similar under >> different size windows. 1/(kf)^a = 1/k^a * 1/f^a, so the magnitude >> of spectrum viewed over a different window is just scaled by a >> certain amplitude. The same applies to the time domain as well >> (but it has to be interpreted as a probability function). > > Then by this standard, the 1/x function is self-similar, and so are > all hyperbolas. That is, as long as similarity is defined as modulo > the group of diagonal matrices conjugated by rotation matrices. > this is true. but fractals are compact (closed and bounded) that shows self-similarity and fractional dimension. f(x) = 1/x is self- similar, but its dimension is 1 and it is not a compact set. > Isn't the definition of fractal requiring some kind of noninteger > Hausdorff dimension? yes, indeed. and this is the case of that noises. don't look at theoretical spectra in frequency domain but signals in time domain ... their dimension is fractional and they show self- similarity. I haven't now time to show they are compact sets, but, for shure, a proof could be found in Mandelbrot, Barnsley, Peitgen, etc ... jmb jose manuel berenguer jmbeal(a)telefonica.net +34932857046 +34696538403. http:// www.sonoscop.net/jmb/ jmberenguer(a)sonoscop.net +34933064128. http://www.sonoscop.net/ caos->sonoscop. cccb. montalegre, 5. 08001 barcelona spain

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Re: [PD] Trying to play a movie with GEM/pd
by IOhannes m zmoelnig 23 Aug '06

23 Aug '06

Javier GarcÃa wrote: > IOhannes wrote: > >>> see the help-patches for [pix_movie], [pix_film] and [pix_texture]. > > > thanks IOhannes, > > i just tried to open several avi's with the example patch pix_movie.pd > and pd crashes always. > > some goes wrong? we still do not know which exact(!) version of Gem you use. without that knowledge we cannot help you much. however, you might experience codec problems. do the example movies that come with Gem (homer.avi, anim-1.mov) work? if the codec is the problem, feel free to search the archives of the pd-list; this has often been discussed. chris clepper has recently been working on a DirectShow based film-loader which should solve a lot of problems for w32 users. mfga.sdf IOhannes

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Conway's Game of Life abstraction
by Chris McCormick 23 Aug '06

23 Aug '06

Hello, Here is an implementation of Conway's Game of Life as a puredata abstraction. <http://mccormick.cx/viewcvs/*checkout*/s-abstractions/s-conway.pd> <http://mccormick.cx/viewcvs/*checkout*/s-abstractions/s-conway-help.pd> <http://mccormick.cx/viewcvs/*checkout*/s-abstractions/cell-receive.pd> Best, Chris. PS This is a lot easier with something like Gridflow: <http://lists.puredata.info/pipermail/pd-list/2002-09/008203.html> ------------------- chris(a)mccormick.cx http://mccormick.cx

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Guitar tab editor
by Alexandre Quessy 23 Aug '06

23 Aug '06

Hi, This is a little guitar tab editor and player for PD. It outputs MIDI notes (on and off). http://alexandre.quessy.net/?q=node/44 A netpd version is coming soon. I would like comments on things that could be improved before I make the netpd version. -- Alexandre Quessy http://alexandre.quessy.net

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adding libraries
by alexandre r. decoupigny 23 Aug '06

23 Aug '06

hey all, i am trying to add the gripd, the xjimmies and the ambisonics ambilib library to pd 38.0 extended version.. is there a way to add more cells to the start up list ? i added the new libraries already through the property list editor, but pd says it cant load the library.... im working on an ibook with tiger as OS.. what can i do ? cheers alexandre -- alexandre r. decoupigny

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Displace an array
by raul diaz 23 Aug '06

23 Aug '06

Hi list! I have a table which contains a wavelet waveform which is not symmetric. I need to displace this waveform to the right in order to make the waveform symmetric. Somebody knows how to displace to the right an array a specify number of samples? Saludos! -- Raul Diaz Poblete ************************* raul.lete(a)gmail.com Ciudad Real [Spain]

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Pd-list August 2006