Re: [PD] i need a bit of help to understand overlapped blocks
# If the block size is N samples (and there is no overlapping) then the patches (subpatches) calculate the audio stream after every Nth sample. At every tick the inlet~s take N samples in and the outlet~s give N samples out. # Overlapping is like you have M identical audio streams which are N/M samples out of phase. For N=1024 and M=4 the frame size is 1024 and the hop size is 256. You have four frames. First one is between samples n0 and n0+1024. Second one [n0+256, n0+256+1024], third one [n0+512,n0+512+1024] etc. 1x1234 2xx1234xxx 3xxx1234xx 41234x oO where O = 41 + 32 + 23 + 14 # Every frame has four parts consists of 256 samples. The output is the sum of these parts. n denotes the streams and numbers are parts of the frames. # If you do nothing inside a patch (just connect the inlet~ to outlet~) 4th part of the first frame is the same as the third part of the second frame and they are equal to second part of the third frame and so on. (41 = 32 = 23...) Because they correspond to the same parts of the incoming input. (I forget whether there is an automatic normalization in PD after summing M frames) # So why we are doing this? Why do we need overlapping? An example where it is useful is DFT (FFT). You get a better resolution in your spectrum if your frame size is big. But with a long frame your time resolution decreases (when you take the FFT at every frame.) You get spectral data at every N'th sample. This is due to the uncertainty relation. # If you want to make a spectral analysis (take FFT), manipulate the spectrum (play with the table which stores the spectrum), and resynthesis the input (calculate the iFFT) then it is better if you use overlapping blocks. Sorry for my bad usage of English! # You can look at a working example/application in the audio examples folder: I03.resynthesis.pd and read the related chapter in Puckette's book. and afaik overlapping is only related to audio signals not to the control signals. -ugur- On Wed, Jul 2, 2008 at 3:56 PM, hard off [EMAIL PROTECTED] wrote: recently i have discovered the joys of using overlapped blocks in sound patches. however, i'm having a little bit of difficulty understanding exactly WHAT gets overlapped, and what doesn't get overlapped. it seems to me that control messages and do not get overlapped, and i can't really tell what happens to external audio signals connected to the overlapped patch. is there some documentation somewhere on this topic? or would a kind person like to tell me basically what functions block overlap has? cheers. matt ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] Phase Distortion Patch
# Hi, while I was looking some examples for my chip design class I came across with this site: http://www.fpga.synth.net/pmwiki/pmwiki.php?n=FPGASynth.PhaseDistortionOscillator where it talks about the idea of Phase Distortion Oscillator: http://en.wikipedia.org/wiki/Phase_distortion_synthesis # I made a very simple implementation of it with Pure Data. (Actually PD is very fast for realizing the ideas!) And want to share it. # I am attaching the patch: PhaseDistortion.pd There are two tables with the same length. First table includes the phase values of the sin function, ie. if the n.th point in the first table has the value x_n then n.th point in the second has the value of sin(2*pi*x_n). My patch is not versatile. It has only one parameter for manipulating the first table. You can change it with the slider and see its effects. (There is some aliasing, because I did not used any interpolation for reading from the table) # Have a nice day! -ugur- #N canvas 206 4 580 616 10; #N canvas 0 0 450 300 (subpatch) 0; #X array phdist 2048 float 0; #X coords 0 1 2047 -1 200 150 1; #X restore 332 365 graph; #X obj 82 18 until; #X msg 82 -5 2048; #X obj 82 61 f; #X msg 112 39 0; #X obj 118 60 + 1; #X obj 82 -26 t b b; #X obj 61 -27 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #N canvas 0 0 450 300 (subpatch) 0; #X array phase 2048 float 0; #X coords 0 1 2047 0 150 150 1; #X restore 90 364 graph; #X obj 82 84 t f f; #X obj 80 151 tabwrite phase; #X obj 425 19 until; #X msg 425 -4 2048; #X obj 427 63 f; #X msg 455 40 0; #X obj 461 61 + 1; #X obj 425 -25 t b b; #X obj 404 -26 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X obj 425 85 t f f; #X obj 425 114 tabread phase; #X obj 425 150 expr sin(2*3.141592*$f1); #X obj 424 193 tabwrite phdist; #X obj 78 330 dac~; #X obj 84 221 phasor~ 110; #X obj 84 246 *~ 2047; #X obj 136 291 hsl 50 15 0 1 0 0 empty empty empty -2 -8 0 10 -260097 -1 -1 1470 1; #X obj 80 107 / 2048; #X floatatom 229 53 5 0 0 0 - - -; #X obj 229 73 t b b f; #X obj 78 128 expr if($f1.5 \, $f1*$f2*2 \, $f2+($f1-.5)*(1-$f2)*2) ; #X obj 194 -11 hsl 128 15 0.25 0.75 0 0 empty empty empty -2 -8 0 10 -260097 -1 -1 5700 1; #X obj 132 331 line~; #X obj 133 310 pack f 50; #X obj 83 304 *~; #X obj 230 32 line; #X obj 229 12 pack f 100; #X obj 16 0 loadbang; #X msg 47 22 0.6; #X msg 17 22 0.3; #X msg 8 130 \; pd dsp \$1; #X obj 8 95 tgl 30 0 empty empty empty 17 7 0 10 -260097 -1 -1 1 1 ; #X obj 86 198 nbx 5 14 -1e+037 1e+037 0 0 empty empty empty 0 -8 0 10 -260097 -1 -1 321 256; #X obj 83 267 tabread~ phdist; #X text 75 514 chosen x values of sin function; #X connect 1 0 3 0; #X connect 2 0 1 0; #X connect 3 0 5 0; #X connect 3 0 9 0; #X connect 4 0 3 1; #X connect 5 0 3 1; #X connect 6 0 2 0; #X connect 6 1 4 0; #X connect 7 0 6 0; #X connect 9 0 26 0; #X connect 9 1 10 1; #X connect 11 0 13 0; #X connect 12 0 11 0; #X connect 13 0 15 0; #X connect 13 0 18 0; #X connect 14 0 13 1; #X connect 15 0 13 1; #X connect 16 0 12 0; #X connect 16 1 14 0; #X connect 17 0 16 0; #X connect 18 0 19 0; #X connect 18 1 21 1; #X connect 19 0 20 0; #X connect 20 0 21 0; #X connect 23 0 24 0; #X connect 24 0 42 0; #X connect 25 0 32 0; #X connect 26 0 29 0; #X connect 27 0 28 0; #X connect 28 0 17 0; #X connect 28 1 7 0; #X connect 28 2 29 1; #X connect 29 0 10 0; #X connect 30 0 35 0; #X connect 31 0 33 1; #X connect 32 0 31 0; #X connect 33 0 22 0; #X connect 33 0 22 1; #X connect 34 0 27 0; #X connect 35 0 34 0; #X connect 36 0 38 0; #X connect 36 0 37 0; #X connect 37 0 30 0; #X connect 38 0 25 0; #X connect 40 0 39 0; #X connect 41 0 23 0; #X connect 42 0 33 0; ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Phase Distortion Patch
# Your technique of using expr~ and creating the waveform on the fly (rather than trying to calculate it in a table and getting clicks and glitches) is great! Now the parameters are real-time tweakeable, as Atte requested! # The problem using a partial function is the discontinuity in its slope. So, i changed the function used in the expr~ with a gaussian function. The width and height of it are adjustable. You can try. -ugur- On Sun, Jun 29, 2008 at 2:59 PM, hard off [EMAIL PROTECTED] wrote: Ugur, here is your original patch with the expr converted into expr~ also, you can get some really cool resonant filter sort of sounds by really distorting the phase (like 10 times). i added a slider for that too. #N canvas 206 73 727 617 10; #N canvas 0 22 450 300 (subpatch) 0; #X array phase 441 float 0; #X coords 0 1 440 0 150 150 1; #X restore 57 425 graph; #X obj 83 392 dac~; #X obj 127 302 hsl 50 15 0 1 0 1 empty empty empty -2 -8 0 10 -260097 -1 -1 3700 1; #X obj 123 342 line~; #X obj 124 321 pack f 50; #X obj 88 366 *~; #X msg 473 326 \; pd dsp \$1; #X obj 473 291 tgl 30 0 empty empty empty 17 7 0 10 -260097 -1 -1 1 1; #X obj 86 45 nbx 5 14 -1e+037 1e+037 0 1 empty empty empty 0 -8 0 10 -260097 -1 -1 100 256; #X obj 367 -6 hsl 128 15 0 2 0 1 empty empty empty -2 -8 0 10 -260097 -1 -1 3600 1; #X obj 388 70 line~; #X msg 387 45 \$1 50; #X obj 183 256 tabwrite~ phdist; #X msg 149 46 0; #X obj 87 236 -~ 0.25; #X obj 86 71 phasor~ 100; #N canvas 0 22 450 300 (subpatch) 0; #X array phdist 441 float 0; #X coords 0 1 440 -1 200 150 1; #X restore 268 422 graph; #X obj 186 174 tabwrite~ phase; #X obj 138 -22 r graph; #X obj 186 146 r graph; #X obj 185 230 r graph; #X obj 265 368 bng 30 250 50 0 graph --- graph -4 -10 0 14 -260097 -1 -1; #X obj 389 14 hsl 128 15 20 100 0 1 empty empty empty -2 -8 0 10 -260097 -1 -1 300 1; #X msg 86 3 100; #X obj 138 0 t b b; #X obj 88 261 cos~; #X obj 289 277 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 1 1; #X obj 319 46 line~; #X msg 320 20 \$1 50; #X text 505 -7 scaled 0 - 2; #X obj 289 302 metro 1000; #X obj 86 136 +~; #X obj 112 107 expr~ $v2*exp(-$v3*pow($v1-.5 \, 2)); #X text 526 13 scaled 20 - 100; #X connect 2 0 4 0; #X connect 3 0 5 1; #X connect 4 0 3 0; #X connect 5 0 1 0; #X connect 5 0 1 1; #X connect 7 0 6 0; #X connect 8 0 15 0; #X connect 9 0 28 0; #X connect 10 0 32 2; #X connect 11 0 10 0; #X connect 13 0 15 1; #X connect 14 0 25 0; #X connect 15 0 31 0; #X connect 15 0 32 0; #X connect 18 0 24 0; #X connect 19 0 17 0; #X connect 20 0 12 0; #X connect 22 0 11 0; #X connect 23 0 8 0; #X connect 24 0 23 0; #X connect 24 1 13 0; #X connect 25 0 5 0; #X connect 25 0 12 0; #X connect 26 0 30 0; #X connect 27 0 32 1; #X connect 28 0 27 0; #X connect 30 0 21 0; #X connect 31 0 14 0; #X connect 31 0 17 0; #X connect 32 0 31 1; ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Pd and Jack(dmp) on XP
# Hi, # Thanks for the info. I downloaded Jackdmp and Qjackctl. They work fine! # But I couldn't figure out how to connect PD to jack server. When I run pd nothing changes in the Connections panel. I'm using Pd version 0.40.3-extended-20080505 Do I have to do something to run jackdmp as an ASIO driver? -ugur- On Fri, May 16, 2008 at 1:40 AM, Steffen Leve Poulsen [EMAIL PROTECTED] wrote: Hi, pdrs FYI Just tested Pd version 0.40-2, jackdmp 0.7 and Qjackctl. Seems there now is a stable free ASIO audio server on XP. I used Pd to monitor demoversions of Reaktor, bAbelton Live, NordModular G2 and Reason with little or no flaws. You can get jackdmp herehttp://www.grame.fr/~letz/jackdmp.html mvh/Steffen Leve Poulsen ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Pd and Jack(dmp) on XP
# Thanks! I did all you said on my desktop with XP and now I'm able to connect Csound and PD using using Jack. # At morning I was on my Laptop with Vista. And regsvr32.exe JackRouter.dll command did not worked. So JackRouter option did not appeared as an ASIO device. (I should pay attention to the titles of the topics) # Have a nice day! -ugur- You need a soundcard with ASIO-drivers or asio4all. Put the content of the Qjackctl folder where you have jackdmp.exe Then do (as stated in the readme) regsvr32.exe JackRouter.dll --regsvr32.exe is in c:/windows/system32. This enables your ASIO apps as jack clients. Now do jackdmp -d portaudio -d -l to get the name of your soundcard. Restart jackdmp -R -S -d portaudio -d name_of_your_ASIO-driver Start Qjackctl start Pd. In ASIO-options in Pd you now have JackRouter. Select and set to 4 in 4 out. In Qjackctl Pd should show up in the connections menu. Set JackRouter options in JackRoute.ini. mvh/sLp ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] request for ideas for a simple noisy unpitched synth
# Hi Nicholas, # I've attached a patch I made just now. It has a slider of which value is recorded periodicaly. At every period the difference between the previous value and the final value is calculated. This calculation gives something related to the velocity of the slider. And multiplied this value with the output of a filtered noise. (try to change the period) So the velocity is dependent to the speed. # And the position of the slider directly controls the frequency value of a bandpass filter. This makes the timbre position dependent. # It is very primitive but I think these are want you wanted. Hope this helps! -ugur guney- On Tue, Mar 25, 2008 at 5:02 PM, nicholas ward [EMAIL PROTECTED] wrote: Hi, Apologies if this arrives twice. Im having email troubles today. I just wanted to ask if perhaps anyone might have a patch or a few starting ideas. I need a synth that will be controlled from just one slider. It must generate varying non pitched noisy sound in response to the position and velocity of the slider. I guess velocity might control the amplitude and position some part of the timbre. My initial thoughts were on something like a virtual rake in some gravel or brushing. Anything will do really as long as it is quite dynamic but without a sense of pitch. Im just getting started on it now but thought I'd ask in case anyone has a noisy patch they might like to fire my way or some approaches. Thanks Nicky ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list velocity-dependent-noise.pd Description: application/puredata ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Box Muller Gaussian noise
# Hi, sorry for jumping into the conversation. I am doing my statistical physics homework and can not read whole mails just skim read them and saw terms like uniform distribution and gaussian distribution. I thought it could be worth to mention the central limit theorem which says that the cumulative effect of every kind of distribution will become a gaussian distribution: http://en.wikipedia.org/wiki/Illustration_of_the_central_limit_theorem http://en.wikipedia.org/wiki/Central_limit_theorem -ugur guney- On Sun, Mar 16, 2008 at 11:13 PM, Andy Farnell [EMAIL PROTECTED] wrote: Wow, that's a gorgeous demonstraton Martin! Everything becomes clear as time - infinity :) And somehow our little Earthling brains are able to spot this signature distribution as we listen to rainfall. Now I'm getting how uniform fall leads to a Gaussian bell around the mean for an area over time. Thanks. Chuck, I'm sorry I couldn't follow all of your derivation of Box Muller, but thanks for the analysis. I think we agree it's a neat trick for an efficient source of WGN. thanks all, Andy On Sun, 16 Mar 2008 16:54:29 -0400 Martin Peach [EMAIL PROTECTED] wrote: Here's a histogram generator (binner) that shows the distribution of [gaussianoise]. Using it I can quickly see that [gaussianoise2] is too peaked around zero and that [gaussianoise3] chops the tails off when the scale is low. If you have uniformly distributed raindrops falling, any given area will receive a number of raindrops that clusters about the mean in a normal distribution, just as if you first bin the number of occurrences of each value of white noise, then bin the resulting counts, the histogram of the counts will look like a bell curve centered at the mean count. Martin Andy Farnell wrote: GEM is broken here, but thanks for the info Marius. I'm reading through the docs for R at the moment. It makes lovely plots, but haven't figured how to get my data in to it yet... JFYI the application is rainfall. Many papers I read describe rainfall as Gaussian. I know from physical analysis that raindrops are uniform in size and velocity for any local sample, so I've realised this distribution is about how they fall within an area and pondering how a distribution can be Gaussian in 2D. Thing is, I can't figure out any good reason why rain should by anything other than uniformly distributed ! :( When I use Martins second patch with a thresholding function to trigger droplet sounds, it does sound a lot more like real rainfall than a uniformly triggered model. I'm in one of those grey areas where I half understand what I'm doing, which is a dangerous place to be. Anybody know of cool papers I might have missed on the distribution of rain drops and the effect on their sound? Thanks, Andy On Sun, 16 Mar 2008 15:43:34 -0400 marius schebella [EMAIL PROTECTED] wrote: from the first equation that andy posted, I produced a gem representation. the box muller noise seems wrong, because it does not use the whole range but is shifted to the negative side. note, this is not a distribution of frequencies, but of noise values.. marius. Martin Peach wrote: Oh no that's wrong isn't it :( The log is necessary to keep the distribution normal, and the range is going to get wider the closer to zero the radius is allowed to get. The attached patch has a scale adjustment... Still I wonder what kind of distribution gaussianoise2 gives, it's not just white. Martin Martin Peach wrote: Charles Henry wrote: On Sun, Mar 16, 2008 at 11:16 AM, Martin Peach [EMAIL PROTECTED] wrote: (gaussianoise has occasional values that exceed [-1 ... 1], which I suppose is normal...white noise is always on [-1...1]) That's true. With the Box-Muller method, there is the log(~U1) term, but you can always just add a small value to U1, which will truncate your distribution. The size of the small value can be calculated to fit with any given threshold. I think it's really because the Box-Muller method selects random numbers in pairs which map to points in a unit square on the plane, but then selects only those points which are inside the unit circle, something that the pd patch doesn't do (how to resample points in a dsp vector until they are in range?). The attached patch shows the straightforward way of doing it by simply selecting a random radius and angle and returning the resulting y coordinate as the random number. The results are always on [-1,1]. I don't think sin~ will be any slower than log~. Martin
Re: [PD] Midifile Object
# Hi, # I'll be very happy too if this feature can be done. Once I made a demonstration about tuning systems, where I used a midi file as the input. I packed the midi file with the patch but it did not work on any computer other than mine because [midifile] could not find the file. # Thanks in advance! -uğur- On Thu, Feb 14, 2008 at 8:26 PM, saint [EMAIL PROTECTED] wrote: hi martin/all, sorry for buggin you about this again, but unfortunately i can't use your (or any) midi external for my purpose if i can't get this to work. the problem i'm having with midifile is this: i can't get midifile to read a .mid file that's in the same folder as the pd patch by referring to it by it's short name only i.e. without the full path c:/progra~1/etc/etc (which does work btw, thanks) is there anyway to get this... [read test.mid( | [midifile] ...to work?! (where the midi file and pd patch are in the same folder of course) ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Granular Synthesis Study
On Dec 16, 2007 1:02 AM, [EMAIL PROTECTED] wrote: is it just about getting rand. varieble amplitude sinusoid ? i have made a nice object called 0sc~ - which is like an unstable oscillator (amplitude wise, and frequency wise if Q is small) it is just a cascade of vcf~ with noise~ (and pink~) put trough that # Granularity comes from the fact that the overall sound is the sum of short sound segments (which are 5 to 30 msec long). To avoid glitches due to discontinuity these segments are calculated by enveloping a sinusoidal with a gaussian. # In my patch I prepared some sound segments with definite duration and frequency and triggered them with regular time intervals. mine isn't making sound similar to yours ..i'm not sure does it fall in the granular concept ? # In this view, I think your object works in continuous signal domain. -ugur- ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] How to use CVS (was: Granular Synthesis Study)
# Hi, # I looked at http://pure-data.cvs.sourceforge.net/pure-data/ There are lots of externals and abstractions there. (Most of which I saw/remember in Pd-Extended package) # I found [nqpoly4] here: http://pure-data.cvs.sourceforge.net/pure-data/abstractions/nqpoly/nqpoly4/by browsing the folders. But couldn't find [polypoly~]. Is there an easier way to download a whole folder, instead of opening a patch's own page and clicking download. And how can I search through this CVS archive? Do I need a special software for this kind of jobs? -ugur- # In my PD distro (0.39.2-extended-test7) [polypoly~], [nqpoly4] does not exist. So I can't use them. They are just abstractions, you could get them from CVS and then use them. Both really help with creating and managing many copies of an abstraction. Frank Barknecht _ __footils.org__ ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] wave guide patch
# Thanks! # Here, the ingenuity is in the table/array object. I think table is such a powerful tool of Pd, which I miss in different environments (Octave, Csound etc). You can read, write and visualize at the same time, you can even draw a shape with your mouse! This flexibility makes it possible to use it in many different contexts. Many thanks to the developer of this object! -ugur- On Dec 3, 2007 2:26 PM, hard off [EMAIL PROTECTED] wrote: actually i really love this one. great idea and well put together. you set up a really good system with the 3 arrays, so the visual representation is very effective. it's one of the problems with pd that the visual element is not so easy to access. always good to see a nice relation between sound and vision. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] tabread4~~
On Nov 23, 2007 7:15 AM, Mathieu Bouchard [EMAIL PROTECTED] wrote: On Sat, 17 Nov 2007, Uur Güney wrote: An example of sound producing mechanism is plucked and vibrating string (or vibrating membrane) It is a continuum and so has infinite dimensions. It's not because it's a continuum, that it has infinite dimensions. Real numbers form a continuum, but have only 1 dimension. The set of all possible continuous functions over a given finite interval, forms a continuum that has infinitely (countably) many dimensions. This continuum also happens to include some simple (Fourier-compatible) discontinuities as well. (Including all possible discontinuities is another story.) Physical sounds can be understood to have no discontinuities, as several factors tend to low-pass the sound enough to remove discontinuities. # Ok. I got it. Thanks for clarification. # Once I asked to my Non-linear Dynamics teacher. Isn't the shape of a string a 1D function of its length? Why we are calling it as continuum? And she said that: A simple harmonic oscillator makes a 1D motion (in time). It goes back and forth. You can approximate a string as N connected harmonic oscillator lying along a line. if N goes to infinity we'll have a SHO at every point in space, which makes a 1D motion in time. And this is a field, and hence it is a continuum. # This is in accordance with your definition, an ideal string can have any shape, so its possible shapes form the set of all possible continous functions over its length. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] unit impulse without [dirac~]
# What is preserved is the area under the function, it is equal to one (its
just 1, with no physical dimensions like energy. So, if x axis has the
dimensions of L(ength), y-axis has the dimension of 1/L). When you let the
bottom side's length of a triangle shaped function to go to zero, for
preserving its area, its height goes to infinity. Dirac Delta Function is
defined as this limiting case, other limiting case where the height goes to
zero and so length goes to infinity is unrelated to Dirac Delta Function.
(actually it is not a function, but a distribution. :-) Its behavoir is very
pathologic for a function. Distributions are more general.)
# The idea behind all of this cumbersome things become useful when you
multiply a function with Dirac Delta and take the integral:
integral{f(t)*delta(t-a)*dt} = f(a)
# So, Delta function takes a sample (a snapshot) from the function at time
a.
# It can be used as a mathematical approximations of some real signals
(there can't be any physical quantity of which amplitude is infinity) or a
tool for solving problems.
-uğur-
On Nov 17, 2007 11:01 AM, Andy Farnell [EMAIL PROTECTED] wrote:
Is it correct to say that the Dirac impulse preserves
energy, as it tends towards zero time length the amplitude goes to
infinity and if we
squashed its amplitude to zero it would be infinitely long? In which case
Dirac impulses
are theoretical and not practical digital signals?
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Re: [PD] tabread4~~
On Nov 17, 2007 3:16 AM, Charles Henry [EMAIL PROTECTED] wrote: We structure events in music as a function of time. f: R (time) - (set of possible sound events) The topology in this case is clear. It's a line, and music is a function mapping 1-D into the space of all possible sounds. we can only have the paths as functions of time. So, no matter how complicated the song structure gets, you can flatten it into a single function. Any thoughts? # Here is my conceptualization of sound as a 1-D function. # Musical data is one-dimensional if it is recorded on a medium or is transmitted through some fluids. It is an array of number in digital media, changing voltage through cables and changing excess pressure of air when transmitting through air. All of these are simple functions of time. # But the musical data of composition (in the mind of the composer), or the sound producing mechanisms are not one dimensional. The composer builds its ideas not on one dimensional space but she has structures which may have certain hiyerarchies or orderings. For example, if there is harmony, there are more than one voice. Two voice works are two dimensional vector functions of one variable (time) (if we are at the abstraction layer of notes) An example of sound producing mechanism is plucked and vibrating string (or vibrating membrane) It is a continuum and so has infinite dimensions. # What we hear is the projection of all these data (different instruments, song structure etc.) onto 1 dimension. (This parts can be called bases of the space of all possible sounds as mathematical metaphor in linear algebra.) This projection is done by mixing different tracks or listening to an ensemble, so by simply taking the superposition of different audio signals. And our perception system has full of analysers which guess/try to understand/estimate/visualize etc. the original data from this reduced 1 dimensional data, namely sound. # If find it very interesing that we receive a one dimensional sound signal and perceive which instruments are there, who is talking, where the foot steps coming from, water in the pod is boiling etc... We extract the projected/compressed information as much as we can. -uğur güney- ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] about sexy-ism
On 10/26/07, vade [EMAIL PROTECTED] wrote: Its a joke. Get over it. Comedians do it at venues of over a 1000 all the time. Ever hear of George Carlin, Bill Hicks, Eddy Murphy (back when he was funny..), etc etc. # Of course we can understand that mail was a joke. But there are many kind of jokes, good ones, bad ones etc.. And joking by its own does not justifies the content. Whether or not the PD list is the place for this, well, frankly, I'll agree it isnt, but that was my point about 3.5^10 emails ago - this thread is mind boggingly off topic - but that did not stop discussion over such amazingly interesting topics as the etymology of sexism, constructive comments about street jargon, academia and fun statistics over who applied and got accepted to what. Jesus fucking christ, its a joke about CONSENSUAL SEX USING PD OBJECTS AS A METAPHOR. OH NO. OH DEAR GOD OH MENSTRUATION. OH YUCK BOO HOO. # Thanks for the clarification. Capital letters revealed the true irony obscured by the complicated metaphor. No one notices Hard off also making fun of himself there. Ah, so typically one sided. Look. We are all humans. Some of us have vaginas, others penises. (hell some even have both) Some of us use PD and/or other Dataflow languages. Can we PLEASE GET OVER IT ALREADY? That email was more a comment on the lunacy of the aforementioned thread as well as some of you over intellectualizing every goddamn last minutiae of the topic - rather than an actual genuine heartfelt AFFRONT TO ALL OF WOMANKIND. Perhaps if you took of your lab coat, removed the various PHDs from behind your desk, and any other assorted academic paraphernalia that may be laying about* - including the self righteousness - you might see that last email as an attempt to cut through the bullshit of this topic. Im sorry I have to spell it out for you. # Underestimating the academia and intellectual work is being proud of the ignorance. I think, calling the previous emails about such amazingly interesting topics in this thread lunacy and your justification of the joke is worse than the joke itself. # Being sensitive and thinking hard about whether the relative smallness of the female population is due to some inherent issues that we are not aware of and taking responsability is not something one can make mockery. This subject is not off topic but a part of computer music and pd community. And mocking about what people take serious will not be met with joy. -uğur- *I am well aware that you and others may literally have said items behind your potentially non existing desk, however, I hope you can all grok the metaphor - somehow I feel ill be disappointed yet again... The bottom line is, if PD is going to be used by Artists, prepare to be offended. On Oct 26, 2007, at 2:20 PM, Alexandre Castonguay wrote: I think the post and this attitude has no place on this list. The use of objects is smart but it doesn't excuse the moronic and offensive nature of the post. What makes you think that your freedom of speech should come at the expense of women feeling violated and insulted? I wonder if you would state something like that before a crowd of 1000. I feel disgusted. Alexandre ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] bouncing
# I read the first mail and find an algorithm for the special case of moving point particles in a 2D pentagon boundary. The answer is given as using pyode script but I am excited about my solution and want to share it with you :-) # The easy part of using a rectangular boundary (of which sides are parallel to the axes) is that, one should only check if x position of a particle is greater than x_max (coordinate of the right side of the rectangle), if xx_min, yy_min and yy_max. And if it exceeds the boundary in the next step of the simulation according to ODE (or any kind of calculation) of the simulation, then reverse the velocity in that direction (and mirror the coordinate using the boundary line as the axis of symmetry). # So, We can try to use this simple idea in pentagon case. # We can divide the pentagon in five triangles: Put a point in the center and draw lines to vertexes. http://www.math.union.edu/~dpvc/courses/1999-00/MTH012-02-WI00/notes/DividedPentagon.jpghttp://www.math.union.edu/%7Edpvc/courses/1999-00/MTH012-02-WI00/notes/DividedPentagon.jpg # Call the bottom triangle 0th triangle, turn in counter clockwise direction and call other triangles as 1st, 2nd... # The algorithm is as following: # First determine in which triangle the particle is. One can get this using an atan2(x,y) like function. atan2 returns the angle between the position of the particle and the x-axis. We can beforehand calculate the angles between the sides of triangles and the x-axis. And using this information we can find in which triangle the particle is. (or maybe y/x is just enough for determination) # If it is in the zeroth triangle, all we have to do is to look for the y position. If it is less than minus of the height of the bottom triangle then it exceeds the boundary. Apply the reflection like in a rectangular boundary. # One can not do this in other triangles (1st, 2nd...). Because their boundaries are not parallel to axes but they have slopes. So, if we rotate the coordinate system, until the bottom side of the triangle becomes parallel to y-axis, e.g. rotate 72 degrees clock wise for 1st triangle, 2*72 degrees for the 2nd..., (360/5=72) we can apply this reflection law. (this is the trick) # After applying the reflection one must rotate the coordinate system counter clock wise. # Here is the formula of rotating a coordinate system (taken from Arfken, Mathematical Methods for Physicists). (x,y) is the coordinate in the old system and (x', y') is the coordinate in the new (rotated) system, a is the angle of rotation. x' = x*cos(a) + y*sin(a) y' = -x*sin(a) + y*cos(a) # But one don't have to make trigonometric calculations for every rotation, because a is constant. It is 72 or integer multiples of 72 and one can calculate sines and cosines beforehand e.g. sin(72) = 0.9511, cos(72)=0.3090, for CCW rotations, and sin(-72)=-0.9511, cos(-72)=0.3090 for CW rotations. # Here is the pseudo code: take_the_simulation_one_step_further() for_each_particle: n = the_number_of_triangle_which_includes_the_particle(x,y) (x',y',vx',vy')=rotate_the_velocity_and_coordinate_of_the_particle(-n*72,x,y,vx,vy) (x',ynew',vx',vynew')=reflect_the_particle_(if_necessary)_as_if_it_reflects_from_the_bottom_of_a_rectangle(x',y',vx',vy') (x,y,vx,vy)=rotate_the_velocity_and_coordinate_of_the_particle(n*72,x',ynew',vx',vynew') # I didn't try this of course, but seems plausible. Thanks for reading :-) -uğur- On 10/13/07, marius schebella [EMAIL PROTECTED] wrote: hi, I need to bounce objects against a border that is not running parallel to x or y, but in a gradient angle. actually I need to bounce the objects within a pentagon. iSeg2D allows object to cross the border when they bounce, there is no x/y-max for gradients. I am also looking into frank's pyode script. Is there something in it, that can do that? marius. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] [PD-announce] call for pdpedia language site admins
# Thanks, # What I did wrong was to create http://wiki.puredata.info/tr/MedyaViki:common.css not http://wiki.puredata.info/tr/MedyaViki:Common.css # So, we should pay attention to Capital letters! -uğur- On 10/2/07, marius schebella [EMAIL PROTECTED] wrote: go to http://wiki.puredata.info/en/MediaWiki:Common.css and copy the text to http://wiki.puredata.info/tr/MediaWiki:Common.css the box style should the show up. marius. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] translations for pdpedia templates
On 10/2/07, Hans-Christoph Steiner [EMAIL PROTECTED] wrote: I just edited the script to handle the translations. Here are the variables that need to be translated. Please give them to me _exactly_ how they should appear, with caps, spaces, accents, etc. They'll go straight into the templates. For things like how case is used, I think we should follow wikipedia's standards. # These are for Turkish / Türkçe translations -uğur- # wikipedia terms $stub = Taslak; $template = Şablon; $category = Kategori; $infobox = Bilgi Kutusu; # pdpedia terms $objectclass = Nesne Sınıfı; # page headers $inlets = Girişler; $outlets = Çıkışlar; $arguments = Argümanlar; $messages = Mesajlar; # infobox $name = İsim; $description = Açıklama; $abbreviation = Kısaltma; $library = Kütüphane; $author = Yazar; $developer = Geliştirici; $releaseVersion = Versiyon; $releaseDate = Yayım Tarihi; $dependencies = Bağımlılıklar; $license = Lisans; $website = Web Sitesi; $programmingLanguage = Programlama Dili; $platform = Platform; $operatingSystem = İşletim Sistemi; $language = Lisan; $dataType = Veri Tipi; $distributions = Dağıtımlar; ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] [PD-announce] call for pdpedia language site admins
Who wants to lead their own language? kim istemek -e doğru götürmek onların kendi dil? (umm, yes, these might be silly since they are machine translations :D ) # This is an awful terrible translation. :-) So the turkish translation can not be leaved to AI's. One should take the responsibility! And I am volunteering for this work. -ugur guney- On 10/1/07, Hans-Christoph Steiner [EMAIL PROTECTED] wrote: Now we are ready to start setting up sites in whatever language people want. Here's the key: in order to setup a given language, we need at least one volunteer to be the maintainer of that language section. You will then be given bureaucrat and sysop status so that you can admin that site. .hc ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] [PD-announce] call for pdpedia language site admins
# Hi, Marius and all, http://wiki.puredata.info/tr/MedyaViki:common.css # I created that page. But still the infobox does not show up at http://wiki.puredata.info/tr/%C5%9Eablon # What should I do? Is the problem related to the name of the file common.css Did I created/uploaded a file by creating that page? Thanks... -uğur- On 10/2/07, Hans-Christoph Steiner [EMAIL PROTECTED] wrote: As for Infoboxes not showing, you need to add some CSS, you can copy and paste this one into a page of the same name. Otherwise, post to the Pd list, Marius and others know that part better than me. http://wiki.puredata.info/en/MediaWiki:common.css # I tried to create a template entry Şablon in the main page (Ana Sayfa). I copied the source of [abs~] to Şablon and translated the labels. But I encountered my first obstacle. The Infobox Objectclass did not display at all. # How can I solve this problem? # Thanks! -uğur- ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] [PD-announce] call for pdpedia language site admins
http://wiki.puredata.info/tr/index.php?title=%C5%9Eablon:Infobox_Objectclass # I created the object but this time borders are not visible. :-( # Sorry for bothering too much, I'm new to MediaWiki. -uğur- http://wiki.puredata.info/tr/%C5%9Eablon On 10/2/07, marius schebella [EMAIL PROTECTED] wrote: you also need to create the template for the objectclass. you can have a look at: http://pdpedia.at.or.at/en/Template:Infobox_objectclass be careful with capital letters. marius. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
