Pd-list March 2010

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152 participants
270 discussions

tabread4~ "broken" interpolation algorithm - was Re: Max Smoother Audio than Pd?
by Matteo Sisti Sette 29 Mar '10

29 Mar '10

Hi, > Well, if you use [tabread4~] or any of the many other Pd objects > that use the same broken interpolation algorithm > (copy/paste programming), Broken? What's wrong in the tabread4~ interpolation? (note this is not a sarchastical question implying there's nothing wrong in it, it's a genuine question in order to learn what's wrong in it) Is it a bug? Claude wrote: > If you use [tabread4] to interpolate graphical > parameters for animations, the discontinuities in the derivatives are > really obvious. [....] > But IMHO if you're doing piecewise cubic interpolation, it's a bit > of a nonsense to have a cubic that goes through all 4 points when > it's only being used between the inner-most 2 points Well using 4 points to interpolate the curve that goes between the two inner points should guarantee the absence of discontinuities in the first (and second?) derivative; that should be the purpose. Now if there actually are discontinuities then there must be some trivial error in the equation, no???? Or am I missing something??? -- Matteo Sisti Sette matteosistisette(a)gmail.com http://www.matteosistisette.com

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Weird [delread~] behavior under -nogui
by Florian Hollerweger 29 Mar '10

29 Mar '10

Dear list, When starting Pd with the -nogui flag, [delread~] seems to ignore its float input (specifying the delay time in ms) and instead produce sounds which resemble a [delwrite~]/[delread~] loop at very short (one block of audio?) delay times. Attached is a minimal example. (Attention, this will play straight to your soundcard at -20 dB for easy testing with -nogui!). To try, please start Pd first with and then without GUI. I have observed this behaviour with Pd 0.41.4 under Debian GNU/Linux. Anyone else who ran into trouble with this or might know what's going on? best, flo.H === BEGIN MINIMAL EXAMPLE === #N canvas 2 0 568 517 10; #X obj 132 359 dac~; #X obj 139 118 loadbang; #X obj 132 153 metro 1000; #X obj -23 386 loadbang; #X msg -23 441 \; pd dsp 1; #X obj -23 413 del 1000; #X obj 53 151 osc~ 220; #X obj 61 251 *~; #X msg 80 200 1 \, 0 100; #X obj 80 225 line~; #X text 330 478 Florian Hollerweger \, 2010; #X obj 132 330 *~; #X obj 205 294 dbtorms; #X obj 205 246 loadbang; #X msg 205 270 80; #X obj 162 220 delread~ line 350; #X obj -13 332 delwrite~ line 580; #X text 45 410 <- This [del 1000] is required due to another -nogui bug (audio will not work under -nogui without it); #X text -11 88 Tested with Pd 0.41.4 under Debian GNU/Linux; #X text 249 272 Master volume; #X obj 161 332 *~; #X msg 164 193 500; #X text -10 8 -nogui bug: This patch creates a test signal on the left channel once a second \, which is delayed through [delwrite~] and [delread~] and then repeated on the right channel 500ms later. But when started with -nogui \, the delay time of 500ms seems to be ignored.; #X connect 1 0 2 0; #X connect 1 0 21 0; #X connect 2 0 8 0; #X connect 3 0 5 0; #X connect 5 0 4 0; #X connect 6 0 7 0; #X connect 7 0 16 0; #X connect 7 0 11 0; #X connect 8 0 9 0; #X connect 9 0 7 1; #X connect 11 0 0 0; #X connect 12 0 11 1; #X connect 12 0 20 1; #X connect 13 0 14 0; #X connect 14 0 12 0; #X connect 15 0 20 0; #X connect 20 0 0 1; #X connect 21 0 15 0; === END MINIMAL EXAMPLE ===

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Re: [PD] Max Smoother Audio than Pd?
by colet.patrice＠free.fr 29 Mar '10

29 Mar '10

hello, In fact I've no clue about how max instrument patches sounds, only using it for livelooping, but I and other musicians like me didn't like the sonority of netpd for example, because rendered texture are poor, only one sytnh sound good (I don't remember which one), and once we've turned around all sonorities of this synth, there's not much things to play with. I'm not blaming the great work of roman on netpd, but just demonstrate that in despite a lot of efforts to have tools for making music with pd, there's no way to make something smooth enough to be commercial, unless cheating with some steinberg or direct x stuff, of knowing by heart all the dsp tricks. Anyway, I'd like to hear something composed by a king of pd patches, for the fun. ----- Mail Original ----- De: "Matteo Sisti Sette" <matteosistisette(a)gmail.com> À: porres(a)gmail.com Cc: "PD list" <pd-list(a)iem.at> Envoyé: Jeudi 25 Mars 2010 18h17:11 GMT +01:00 Amsterdam / Berlin / Berne / Rome / Stockholm / Vienne Objet: Re: [PD] Max Smoother Audio than Pd? > So, I think this is an important myth to get over... Well that seems a kinda "biased" approach :) Whenever anybody says that "Max sounds smoother than Pd" (or viceversa of course) we should force him to answer these three questions: 1) define "smoother", what the hell does it mean (is it less clicks/pops? is it less dropouts? or what else?) max provides many objects that easily remove or avoid clicks/pops, on pd we almost always have to follow some patching rules that easily drive the lay person to mistakes, that generate clicks and pops 2) are you comparing with the same hardware? 3) Let me see the patches (ok this is not a question - this is a demand, lol)

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Re: [PD] Birds use stars - diatonic
by Matt Barber 29 Mar '10

29 Mar '10

>> What are some ways of telling each of the synths to "round" to the >> nearest note in a diatonic scale? > > think of all the separation points between what is rounded to one note, > and what is rounded to another note. > > for a standard Do major scale, if all your inputs are between 60 and 72, > you can split with this : > > [moses 61]/[moses 63]/[moses 64.5]/[moses 66]/[moses 68]/[moses 70]/[moses 71.5] > > because those are the averages of any two consecutive notes of the scale. > then you connect each left-outlet to the note that you want that range of > values to become. > > there are further tricks for supporting multiple octaves without having to > make a longer chain of [moses]. > > as a shortcut to make many [moses], there is [range] : > > [range 61 63 64.5 66 68 70 71.5] > > in the GridFlow library. > You can also take your values mod 12 and use those numbers to read indices in a 12-member table you've populated with a mapping onto your favorite scale. If your values are floats you might round them first. You can also keep track of the whole-number quotient of your value divided by 12 so that you can get your specific octave back as well -- this gives you the equivalent of an "octave-pitch-class" notation, like the kind you might find in csound. Matt

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Max Smoother Audio than Pd? (was: Pd, Max/Msp, Reaktor, Plogue Bidule... How do these compare?)
by Alexandre Porres 29 Mar '10

29 Mar '10

"I feel Max produce a smoother audio than Pd. Didit" So, did anybody get to this and finished up the discussion (I didn't see it, sorry)? Anyway, it doesn't make sense to me. For starters, the sound is made by your sound card (and whatever you feed it) and your speakers actually. It's al numbers inside! And they're computed by your CPU... as far as the software goes, it doesn't generate randomly noisely distorted signals. Or does it? :) Well, actually, in this software, most of what you get is not provided by the software. You get a blank canvas when you start it, in other words: "What you did is what you get". Sometimes the clicking can be some silly detail like using a 5ms [line~] in switching the the gain... or some other bug, we'd have to see what you're doing. So, I think this is an important myth to get over... I hope this thread gets to it. Cheers Alex 2010/3/24 Alexandre Porres <porres(a)gmail.com> > "i can't remember exactly where i read this, sorry. but i'd really like to be > able to use the vst object to run it in ableton. Jeff" > > > Hey, why don't you just create a bridge between Live + Pd with Jack? > > Alex > >

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Re: [PD] Pd Shirts
by Marco Donnarumma 29 Mar '10

29 Mar '10

I think a black one would be cool in general. I would love one. a black one might be difficult because the printing color is black > already - white would be really easy. is it only you who wants a black > one or do you think a black shirt is cool in general (how many shirts > should be black?) - i'll see what i can do > > pricing isnt settled - persons who buy them to sell them at > conventions will get the shirts at cost price. the profit feeds back > to pd community. most likely money will go into projects for > documentation (see earlier posts on the shirts). > > it would be nice to have a link on pd related sites such as > puredata.info so people know about it > best regards max > > Am 24.03.2010 um 20:56 schrieb Roberto Duarte: > > > how about a black one? > > how much anyway? > > best > -- Marco Donnarumma aka TheSAD Independent New Media Arts Professional, Performer, Teacher - Edinburgh, UK PORTFOLIO: http://marcodonnarumma.com LAB: http://www.thesaddj.com | http://cntrl.sourceforge.net | http://www.flxer.net EVENT: http://www.liveperformersmeeting.net

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read png with pdp
by Martin Eckart 29 Mar '10

29 Mar '10

Hi all, I'm just starting to play around with PDP and I'm having a moment of extreme noobishness. I'd like to simply open and display an image from a file on disk (png/jpeg/tif whatever). From what I can tell this can be done by using pdp_reg and sending a load_png message along with the path. When I try this, nothing happens (no window is created nor console output). I know that it's finding the file since the console will output and error if I send it a bogus path. It's possible I'm missing a library (I installed libpng3 but no dice) or some supremely obvious step. The other method that I tried was using the pdp_rawin object and sending it a open message. What's not clear to me is how to set the type message properly (bitmap/rgb/1920x1080 doesn't do much on a jpeg or png) or potentially output the raw image in a pipe. I'm running pd-extended on Ubuntu Karmic. Any help is greatly appreciated. -martin

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Birds use stars - diatonic
by Mathieu Bouchard 29 Mar '10

29 Mar '10

> What are some ways of telling each of the synths to "round" to the > nearest note in a diatonic scale? think of all the separation points between what is rounded to one note, and what is rounded to another note. for a standard Do major scale, if all your inputs are between 60 and 72, you can split with this : [moses 61]/[moses 63]/[moses 64.5]/[moses 66]/[moses 68]/[moses 70]/[moses 71.5] because those are the averages of any two consecutive notes of the scale. then you connect each left-outlet to the note that you want that range of values to become. there are further tricks for supporting multiple octaves without having to make a longer chain of [moses]. as a shortcut to make many [moses], there is [range] : [range 61 63 64.5 66 68 70 71.5] in the GridFlow library. _ _ __ ___ _____ ________ _____________ _____________________ ... | Mathieu Bouchard, Montréal, Québec. téléphone: +1.514.383.3801

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Re: [PD] Pd Shirts
by Ben Baker-Smith 29 Mar '10

29 Mar '10

>>If there's a black version, I would like one :) I'll take one regardless! I'm glad someone's reviving this effort. -Ben

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Birds use stars - diatonic
by Jerome Covington 29 Mar '10

29 Mar '10

http://puredata.info/Members/game/birds-use-stars.pd/view What are some ways of telling each of the synths to "round" to the nearest note in a diatonic scale? -- Regards, Jerome Covington . . . . : . . . . : "define audio development"

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Pd-list March 2010