Pd-list August 2006

pd-list@lists.iem.at

131 participants
259 discussions

[PD-announce] [merchandising]: pd-book "bang | pure data"
by IOhannes m zmoelnig 21 Aug '06

21 Aug '06

Here is some information on where the pd-book is available. The distribution is mainly handled by our publisher, a small Germany based house; therefore i think there is an emphasis on mid-european distribution. Nevertheless it should be possible to order the book to wherever you live. publisher: http://www.wolke-verlag.de http://www.wolke-verlag.de/neuerscheinungen/zimmer.htm their webshop: http://www.buecher-zur-musik.de/ http://www.buecher-zur-musik.de/53108697370a2cb3f/5310869823018c609.html amazon: http://www.amazon.de/gp/product/3936000379/303-1228006-8764204?v=glance&n=2… (note: it seems like the book is only available at amazon.de and not (yet?) at amazon.com) happy shopping! mfg.asd.r IOhannes _______________________________________________ PD-announce mailing list PD-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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Re: [PD] Colored (fractal, 1/f^a) noise generator for PD
by Charles Henry 21 Aug '06

21 Aug '06

On 8/20/06, Mathieu Bouchard <matju(a)artengine.ca> wrote: > Why do you say "fractal" ? 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). Note: the fractal-ness of this noise is compromised by having a sampled signal It's a true fractal only when considered as a continuous function. But for large enough windows (where the sampling effects can be basically neglected), it acts like a fractal. Chuck P.S. sorry Mathieu for the redundant messages

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Re: [PD] Colored (fractal, 1/f^a) noise generator for PD
by alberto.zin＠poste.it 21 Aug '06

21 Aug '06

Hi Mathieu if I'm not wrong, as long as it is white it is flat in spectral terms but the distribution of amplitudes (probability density function, pdf) of white noise can be gaussian, cauchy, uniform, etc. Therefore I'm not sure that the spectrum is proportional to the pdf.. Alberto On Sun, 20 Aug 2006, alberto.zin(a)poste.it wrote: > You are right. BTW, I already wrote an external for gaussian noise > generation (it is an easy adaptation of the noise code + Box-Muller > transform to make it gaussian - not distributed yet because I've to > clean up the code, it is my first external ;-). But it did not change it > very much :-( In addition it seems that using noise~ is still ok to have > the desired slope in the spectrum... Doesn't a Gaussian distribution have a spectrum proportional to its own density? That is, exp(-s^2/var)/sqrt(2*pi*var). That means that in the dB vs octave graph, it would appear as a quadratic instead of a straight line, and this doesn't match any of the examples shown in the Colors_of_noise article. Right? _ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard - tél:+1.514.383.3801 - http://artengine.ca/matju | Freelance Digital Arts Engineer, Montréal QC Canada

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Re: [PD] Colored (fractal, 1/f^a) noise generator for PD
by alberto.zin＠poste.it 20 Aug '06

20 Aug '06

Hello Joao, >hello. >i can't explain this feedback. perhaps it is due to some >iteration >when reading some table. anyway, there is a problem in the >abstraction : noise~, as you say, is not a gaussian noise >source. it >is a uniform white noise source. >to have a gaussian noise source in pd, i suspect a pd >external should >be writen. You are right. BTW, I already wrote an external for gaussian noise generation (it is an easy adaptation of the noise code + Box-Muller transform to make it gaussian - not distributed yet because I've to clean up the code, it is my first external ;-). But it did not change it very much :-( In addition it seems that using noise~ is still ok to have the desired slope in the spectrum... thanks, Alberto

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current sample that is played in an array
by Gerda Strobl 20 Aug '06

20 Aug '06

Dear all, is there a way of getting the actual sample number when playing a short sample (0.1-.1.0 s) from an array, in order to trigger a successive event? Gerda

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Mactel crashing when audio on and no patches open
by David NG McCallum 20 Aug '06

20 Aug '06

Howdy all, I'm running the latest Mactel build of Pd (.40t03), and have noticed that Pd crashes when the audio is turned on and no patches are open. I'm including the crash log with this e-mail. Cheers, David ********** Host Name: snowball Date/Time: 2006-08-20 13:39:16.932 -0400 OS Version: 10.4.7 (Build 8J2135a) Report Version: 4 Command: pd Path: /Applications/Pd-0.40-0test03.app /Contents/Resources/Scripts/../bin/pd Parent: Pd [8961] Version: ??? (0.38) PID: 8962 Thread: 0 Exception: EXC_BAD_ACCESS (0x0001) Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x00000000 Thread 0 Crashed: 0 <<00000000>> 0x00000000 0 + 0 1 pd 0x00040007 sched_tick + 156 (m_sched.c:366) 2 pd 0x000403d8 m_scheduler + 898 (m_sched.c:460) 3 pd 0x000420e7 sys_main + 1348 (s_main.c:312) 4 pd 0x0000228a _start + 228 (crt.c:272) 5 pd 0x000021a5 start + 41 Thread 1: 0 libSystem.B.dylib 0x9000a5c7 mach_msg_trap + 7 1 com.apple.CoreFoundation 0x9082369a CFRunLoopRunSpecific + 2014 2 com.apple.CoreFoundation 0x90822eb5 CFRunLoopRunInMode + 61 3 com.apple.audio.CoreAudio 0x914588da HALRunLoop::OwnThread(void*) + 158 4 com.apple.audio.CoreAudio 0x914586f5 CAPThread::Entry(CAPThread*) + 93 5 libSystem.B.dylib 0x90024b07 _pthread_body + 84 Thread 2: 0 libSystem.B.dylib 0x900492e7 semaphore_timedwait_signal_trap + 7 1 com.apple.audio.CoreAudio 0x91465a10 CAGuard::WaitFor(unsigned long long) + 212 2 com.apple.audio.CoreAudio 0x91465932 CAGuard::WaitUntil(unsigned long long) + 66 3 com.apple.audio.CoreAudio 0x914643a2 HP_IOThread::WorkLoop() + 690 4 com.apple.audio.CoreAudio 0x914640e9 HP_IOThread::ThreadEntry(HP_IOThread*) + 17 5 com.apple.audio.CoreAudio 0x914586f5 CAPThread::Entry(CAPThread*) + 93 6 libSystem.B.dylib 0x90024b07 _pthread_body + 84 Thread 3: 0 libSystem.B.dylib 0x900492e7 semaphore_timedwait_signal_trap + 7 1 com.apple.audio.CoreAudio 0x91465a10 CAGuard::WaitFor(unsigned long long) + 212 2 com.apple.audio.CoreAudio 0x91465932 CAGuard::WaitUntil(unsigned long long) + 66 3 com.apple.audio.CoreAudio 0x914643a2 HP_IOThread::WorkLoop() + 690 4 com.apple.audio.CoreAudio 0x914640e9 HP_IOThread::ThreadEntry(HP_IOThread*) + 17 5 com.apple.audio.CoreAudio 0x914586f5 CAPThread::Entry(CAPThread*) + 93 6 libSystem.B.dylib 0x90024b07 _pthread_body + 84 Thread 0 crashed with i386 Thread State: eax: 0x00459770 ebx: 0x00049f24 ecx:0x00000001 edx: 0x0008b400 edi: 0x00001388 esi: 0x00000000 ebp:0xbffff5c8 esp: 0xbffff5ac ss: 0x0000002f efl: 0x00010202 eip:0x00000000 cs: 0x00000027 ds: 0x0000002f es: 0x0000002f fs:0x00000000 gs: 0x00000037 Binary Images Description: 0x1000 - 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0x93f3afff com.apple.audio.toolbox.AudioToolbox 1.4.3 /System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox 0x93f7a000 - 0x93f7afff com.apple.audio.units.AudioUnit 1.4.2 /System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit 0x966d3000 - 0x96709fff com.apple.audio.midi.CoreMIDI 1.5.1 (41) /System/Library/Frameworks/CoreMIDI.framework/Versions/A/CoreMIDI 0x96ad3000 - 0x96ad3fff com.apple.vecLib 3.2.2 (vecLib 3.2.2) /System/Library/Frameworks/vecLib.framework/Versions/A/vecLib -- __ _ _ _ __ _ http://sintheta.org

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Colored (fractal, 1/f^a) noise generator for PD
by alberto.zin＠poste.it 20 Aug '06

20 Aug '06

Hi, attached is an abstraction for generation of "colored" noise (http://en.wikipedia.org/wiki/Colors_of_noise) using a relatively new method (by J.N. Kasdin, 1995) that uses frequency domain multiplication. White, pink, brown noise (and intermediate flavors) can be obtained by varying a single parameter (the slope of the spectrum in a linear log(PSD)-log(f) plot). I searched a bit in the archives and it seems to me that in for noise generation in PD we actually have noise~ (uniform white noise), pink~ (from zexy and cyclone) and a variety of filters, but no direct generation of 1/f^a noise (am I right?). Inside the archive there is a short readme, look at it first. To me the patch sounds a little "tubby", let me know if you have the same feeling. Any comment, suggestion for improvements is welcome. The abstraction lives in http://www.puredata.org/Members/AlbertoZ All the best, Alberto Zin

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pd-ot -> pd-list?
by Roman Haefeli 20 Aug '06

20 Aug '06

hello everyone, hi IOhannes i remember that once IOhannes proposed to subscribe the whole pd-list to the pd-OT-list, so that every member of the pd-list will get automatically the mails from pd-OT, too, iirc. i just noticed, that i don't get any mails from pd-OT. please let me know, if it is still planned to subscribe pd-list to pd-OT. roman ___________________________________________________________ Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de

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Re: [PD] Colored (fractal, 1/f^a) noise generator for PD
by alberto.zin＠poste.it 20 Aug '06

20 Aug '06

Hi ~Kyle, >But is the algorithm only supposed to generate 1/2 of the >hfa array? >I "doodled" in it, just to play with the convolution, and >now the >agorithm is only writing to the first 512 locations of the >array. Is >it a bug? It is wanted to be like that; actually in the original algo there are arrays (of noise and hfa coeff) of 2n elements: n values are filled, the other are padded with zeros. Then real fft is done on the first n and convolution on 2n elements.. so mine is an adaptation of this. When I looked at the spectrum (in audacity) the noise seems to behave fine; my concern is the strange sensation in hearing the noise, like a small "feedback" even on a single channel of output for high alpha.. Alberto On 8/19/06, alberto.zin(a)poste.it <alberto.zin(a)poste.it> wrote: > Hi, > > attached is an abstraction for generation of "colored" noise > (http://en.wikipedia.org/wiki/Colors_of_noise) using a > relatively new method (by J.N. Kasdin, 1995) that uses > frequency domain multiplication. White, pink, brown noise > (and intermediate flavors) can be obtained by varying > a single parameter (the slope of the spectrum in a linear > log(PSD)-log(f) plot). > I searched a bit in the archives and it seems to me that in > for noise generation in PD we actually have noise~ (uniform > white noise), pink~ (from zexy and cyclone) and a variety of > filters, but no direct generation of 1/f^a noise (am I > right?). > > Inside the archive there is a short readme, look at it > first. To me the patch sounds a little "tubby", let me know > if you have the same feeling. > > Any comment, suggestion for improvements is welcome. > > The abstraction lives in > http://www.puredata.org/Members/AlbertoZ > > All the best, > > Alberto Zin > > > > _______________________________________________ > 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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msgfile in order?
by João Miguel Pais 20 Aug '06

20 Aug '06

I was testing [msgfile], and I'm not sure if there are any bugs going on. Is it normal to: - after a "read" command, a file doesn't always gets loaded. but after a line was inserted manually, it always gets loaded. - a "read" command adds the file (if it gets loaded) to the buffer, without clearing it first - "read" with or without "cr" doesn't seem to make any effect, files are always opened without cr (waiting for ; to mark the end of the line). I really needed this, because of the possibility to move forward/backward in lines. Am I doing something wrong? All testing was made with the help patch of msgfile. Joao -- Lugostr. 14 79100 Freiburg i. Br. Deutschland +49 (0)761 7074997 jmmmpais(a)googlemail.com http://www.puredata.org/Members/jmmmp IBM Thinkpad R51, XP, Pd-Ext-0.39-2-t3

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Pd-list August 2006