Pd-list June 2007

pd-list@lists.iem.at

146 participants
264 discussions

RIP James E. Tittle II
by Tim Blechmann 25 Jun '07

25 Jun '07

www.caringbridge.org/visit/jamestittle -- tim(a)klingt.org ICQ: 96771783 http://tim.klingt.org The aim of education is the knowledge, not of facts, but of values William S. Burroughs

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pd & gem on multiple cpus: howto use???
by Igor Medeiros 24 Jun '07

24 Jun '07

hi all how can i use 2 cpus with pd? i know i can open 2 instances of pd, but how can i assign each one for a different cpu? one running a gem patch and other with a pd audio patch? and the best way to communicate between these 2 instances is OSC? if i record all OSC messages that i send to gem patch i imagine that i can render everything non-realtime later also - with better resolution/size... does anyone works this way? some guidelines would be very helpful... i am on slackware 12 RC1 Linux igorpc 2.6.21.5-smp #1 SMP PREEMPT thx in advance igor -- _________________ www.mediasana.org

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Measuring position between two microphones?
by Chris 24 Jun '07

24 Jun '07

Hi, I made a patch to locate the position of a sound source between two microphones, which looks like this: [adc~] | | | [threshold~ 0.2 100] | | [threshold~ 0.2 100] | | [delay 10] | | [timer] So a number of 10ms means that the source is exactly between the two microphones. This patch works kind of reliable and accurate. But I was wondering if there is a better possibility with higher resolution? At the moment I can distinguish the position with an accuracy of 1.333 ms, means I get about 12 different values out of my tube. Has anyone an idea how I can get more precise readings? I thought about comparing the amplitudes of the two waves I get, but I have no idea how to do this or if this would be more exact. Thanks for any help, Chris

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audio less than or equal, greater than.. cross threshold?
by Alex 24 Jun '07

24 Jun '07

I want to trigger an event when an incoming audio signal (which i know is a ramp between 0 and 1), crosses some threshold. basically i want something like [adc~] | [last sample <= x && cur sample >x] | [a drum or something is triggered] any ideas how i can do that? I don't see how I'd do it with just the built in objects. I realize that the bang will probably only happen at control rate.. I have another app creating this ramp, and I want to be able to sync to it in pd [probably just to trigger drum samples] -Alex

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spectral shift
by Mirko Maier 23 Jun '07

23 Jun '07

hello list, does anybody have a fft patch with the possibility to transpose each bin individually? regards, mirko -- Ist Ihr Browser Vista-kompatibel? Jetzt die neuesten Browser-Versionen downloaden: http://www.gmx.net/de/go/browser

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[Gem] pix_film error question
by Thomas Mayer 23 Jun '07

23 Jun '07

Hello, I sometimes encounter messages "error: [pix_filmNEW]: unable to open file: (filename)" due to some unsupported codices in [pix_file], which is not that big a problem to me. But as I want to play a list of files in a row, is there a specific message on any outlet of [pix_film] associated with this error, similar to streams outputting a length a -1 at the second outlet, so that I can bang a new file to load? Thanks in advance, Thomas -- "Prisons are needed only to provide the illusion that courts and police are effective. They're a kind of job insurance." (Leto II. in: Frank Herbert, God Emperor of Dune) http://thomas.dergrossebruder.org/

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To (re)set block~
by Steffen 23 Jun '07

23 Jun '07

The fact that [set <new-size-as-a-power-of-2>( | [block~] resets the block size seam not mentioned in the help patch (nor the manual). It might be obvious for some, though, i don't know. I had to guess how to use that inlet. Hence i'd like to suggest that this information gets added to the help patch. The question is, then, how to suggest it in the best manner? - by this email? - by altering the help patch and send it to Miller? - by altering the help patch and add it to the patch tracker? - by altering the help patch, 'diff -uw' and add that diff to the patch tracker? - by making a feature request in the tracker? - another way? Thanks for your patients.

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matrices in gridflow
by Mathieu Bouchard 23 Jun '07

23 Jun '07

On Fri, 22 Jun 2007, binarykoala wrote: > my question is if any of you here knows of some abstractions that make > use of GF in matrix comparison? i need to compare 5-d matrix to a value > in order to choose a best possible match (matrices have holes). You have to know what kind of comparison you want to make. there's no obvious way to compare a 5-d grid and a single value. I don't know what's a best possible match. Are you looking for closest value? When you say that the grid has holes, what does a hole mean here? how do you represent the holes as numbers? how big is the grid? how many holes are there? _ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801, Montréal QC Canada

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matrices in gridflow
by danja 22 Jun '07

22 Jun '07

hi, my project has reached that point when all hardware interfacing issues got more or less solved and i started gathering and crunching the data. with it, something that i was expecting but was totally not ready for has arrived... matrices, yeah, the hard stuff for non-programmer like myself. on the channel i was kindly adviced to give GridFlow a shot in doing the job, but as i mentioned my math skills are nothing, and so far GridFlow to me is like a logarithmic ruler to a newborn. my question is if any of you here knows of some abstractions that make use of GF in matrix comparison? i need to compare 5-d matrix to a value in order to choose a best possible match (matrices have holes). sorry, i can even speak math... :) best, danja

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Extracting textfile columns for audio
by toby zardoz 22 Jun '07

22 Jun '07

Hello PD list I'm trying to extract one of three number columns from a text file to drive the pitch of an audio oscillator. I have the .txt file reading all 3 columns of numbers into an array at present but I only want the second column. Ideally I'd like to extract the 2nd column before being read into the array but another solution in this case may also be limiting the numbers read from the array to the oscillator to within a particular range (i.e. the number value range of the 2nd column; 840 - 890). Though the latter wouldn't provide a pure solution it would be workable in this case. As you may have guessed, I'm grapping with pd fundamentals here as an abolute beginner, so I'd really appreciate any suggestions/ patch examples/ explanations etc. thanks Toby --------------------------------- Yahoo! Answers - Get better answers from someone who knows. Tryit now.

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Pd-list June 2007