Pd-list May 2006

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147 participants
245 discussions

Re: [PD] division with remainder
by Hans-Christoph Steiner 17 May '06

17 May '06

I think this was ment for the list: On May 15, 2006, at 5:21 PM, Sciss wrote: > all programming languages i know of, have modulo work with floating > point numbers and hence spit out floating point numbers. i'd find > it very usefull to be able to calculate for example 7.5 mod pi = > 1.2168146928204 etc. ; at the moment it would return 1 which is not > so useful. i though all numbers in PD are floats anyways ... ? > > however changing the existing object is not a good idea, it will > certainly be not backward compatible. > > best, -sciss- > > Am 15.05.2006 um 12:51 schrieb Hans-Christoph Steiner: > >> >> On Fri, 12 May 2006, geiger wrote: >> >>> On Thu, 11 May 2006, Frank Barknecht wrote: >>>> [div] ... and [mod] in that case. >>> >>> Some definitions of [mod] extend it to be able to use the real >>> numbers >>> as first parameter. So 2.45 mod 2 would be 0.45. >>> I think this could be a good extension to Pd's mod object, and it >>> should also be backwards compatible to its current behaviour. >>> The change inside the code would be trivial. Question is how many >>> patches >>> depend on the truncation after the mod operation. >> >> I think that [mod] should probably do whatever ANSI C or ISO math >> stuff does, which I think it currently is doing. Most programming >> languages follow these conventions, so its a good idea for Pd to >> as well. >> >> But the object you propose does sound handy, so maybe it should be >> a separate object, like [floatmod]. >> >> .hc ________________________________________________________________________ ____ If you are not part of the solution, you are part of the problem. - Eldridge Cleaver

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Re: PD-list Digest, Vol 14, Issue 61
by Julian Villegas 17 May '06

17 May '06

Hi Luca, I asked something similar before, and Frank Barknecht remember me that in Pd, the results of any computation are considered to last 0 ms in logical time, in fact it will take some real time to find it, so in case of real-time applications, it's my understood that normally, if an incoming signal arrives in the middle of a computation, it will be ignored. The other option is to develop something with threads for reading your incoming signals, but then you have to pay special attention to the synchronization of them. In my case it seemed to be a good trade-off to assume my incoming signals one at a time, and spaced in time long enough for my object to finish the calculation, instead of doing the whole thing with threads. I hope this helps, if you find a workaround, please let me know... Julian Villegas University of Aizu Synthetic Worlds Laboratory Aizu - Wakamatsu Fukushima Japan 965 - 8580 Me pregunto de un modo pensativo Que significa ser colombiano? No se le respondi. Es un acto de fe JLB. --------------------------------- Yahoo! Messenger with Voice. Make PC-to-Phone Calls to the US (and 30+ countries) for 2Â¢/min or less.

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(no subject)
by lucaturchet1982＠libero.it 17 May '06

17 May '06

Hi, I have a problem in using the matrix object. In fact I am not able to set in the same time more than one element of a matrix with parameters coming in real-time from an application. I tried to use several element object in waterfall (see the patch prove_matrix) but when I print Instead I want that at each instant when I print, is printed only one line with the 3 parameters. I tried also to set a message for the matrix object (see the patch prove_matrix2) but I am not able to do what I want (probably there is something that I do not know in pd...). It is very important for me to be able to set the value for a matrix in real-time. Could someone help me please? Thanks in advance Luca

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Re: [PD] Matrix in pd
by lucaturchet1982＠libero.it 17 May '06

17 May '06

Hi, thanks to answearing me. I needed only multiplication of 18 x 18 matrix, I tested the efficience of the matrix object and I conclueded that for what I have to do they works very good. ---------- Initial Header ----------- >From : "IOhannes m zmoelnig" zmoelnig(a)iem.at To : "lucaturchet1982(a)libero.it" lucaturchet1982(a)libero.it Cc : "pd-list" pd-list(a)iem.at Date : Tue, 16 May 2006 11:56:46 +0200 Subject : Re: [PD] Matrix in pd > lucaturchet1982(a)libero.it wrote: > > > Are there some pd-libraries that implements matrix objects? > > so you found them already... > > > > > Where can I found it? Are they efficient? > > iemmatrix is not written to be especially efficient. i am sure most > things could be done in a more efficient way (however i tried to choose > efficient algorithms rather than efficient implementations) > > > > > In fact I need to do multiplications in real-time > > and the efficience of calcoulation is a strict requirement > > personally i believe than an implementation need not be "efficient" per > se, just "efficient enough" so that it can run on your target system. > > i have never really had any problems (but i used some "tricks" (actually > it was just decoupling calculations with [del]) in the days of > P3-800MHz machines in order to distribute the message load a bit over time) > > > (In particular I have to multiplicate inputs for a matrix in order to obtain outputs that are parameters of input for a sound synthetizer...). > > i don't see any particular strict requirement for efficiency in here. > what sizes of matrices do you expect? 1000x1000 or just 30x26? > which calculations do you need? just multiplication of eigenvalue > decomposition (not that this was implemented)? > > > mfg.asdr. > IOhannes >

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netsend netreceive problems
by ruben patiño 17 May '06

17 May '06

hallo! weÅ½ve got some problems with netsend and net receive. weÅ½ve test one simple patch with net send and netreceive but only works in a local network.weÅ½ve tryng to use the patch from two diferent locations and it doesnÅ½t work. the idea itÅ½s to work with multiple laptops from abroad.we think it must be a problem with firewall or something we donÅ½t know. the idea itÅ½s to work in a patch of collaborative ways of jamming with pd so any similar projects are wellcome thanks --------------------------------- LLama Gratis a cualquier PC del Mundo. Llamadas a fijos y mÃ³viles desde 1 cÃ©ntimo por minuto. http://es.voice.yahoo.com

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Re: [PD] netsend netreceive problems
by shreeswifty 17 May '06

17 May '06

make sure you are not behind a router of course, make sure port forwarding is on. public ip is best. hth On Tue May 16 19:28:16 EDT 2006, =?iso-8859-1?q?ruben=20pati=F1o?= <rubenpatinyo(a)yahoo.es> wrote: > hallo! > we?ve got some problems with netsend and net receive. > we?ve test one simple patch with net send and netreceive but > only works in a local network.we?ve tryng to use the patch from > two diferent locations and it doesn?t work. > the idea it?s to work with multiple laptops from abroad.we > think it must be a problem with firewall or something we don?t > know. the idea it?s to work in a patch of collaborative ways > of jamming with pd so any similar projects are wellcome > thanks > > --------------------------------- > > LLama Gratis a cualquier PC del Mundo. > Llamadas a fijos y m?viles desde 1 c?ntimo por minuto. > http://es.voice.yahoo.com > _______________________________________________ > PD-list(a)iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > Patrick Pagano,M.F.A Digital Media Specialist Digital Worlds Institute University Of Florida (352) 294-2082

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[mp3amp~] didn't compile
by Roman Haefeli 17 May '06

17 May '06

hi all, hi yves i couldn't compile [mp3amp~] on debian i386 and ppc. make exited with: 'mp3amp~.c:291: warning: passing arg 6 of `decodeMP3' from incompatible pointer type' with the nice help of mamalala i changed the line 291: 'hframe.framesize+sizeof( unsigned long), (char *) p, sizeof(x->x_out), &pbytes);' to: 'hframe.framesize+sizeof( unsigned long), (char *) p, sizeof(x->x_out), (int *)&pbytes);' and the line 241: 't_int pbytes;' to: 'int pbytes;' i'm not a c-programmer at all, but after this changes i could compile it without any warning, it compiled also fine on ppc, where i had the same troubles befor. i'm also not sure, who is actually maintaining it. i'd like to ask the maintainer to submit this changes, if nothing speaks against it. roman

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gem [pix_buffer] bug
by sven 16 May '06

16 May '06

hi, the problem: [pix_buffer] doesn't support the [open( method as stated in the pix_buffer helpfile the version is: GEM 0.9 (as part of 0.39.2-extended-test2) on Windows sven.

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finding which instance executes first
by Hans-Christoph Steiner 16 May '06

16 May '06

I am about to start working on the [hid] v2 stuff, and I just had a thought. Is there any way to find out which instance of an object executes first? My idea is to have the first instance of the [hid] object do the reading of event data from the OS and write it to memory. Then every other instance will just output the data from memory. But in order for this to work properly, the first instance to execute needs to do the data-getting. Another idea is to have a boolean flag set when the first instance reads the data from the OS, then at the beginning of each message processing cycle, that flag would be reset to false. hmm... .hc zen \ \ \[D[D[D[D

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division with remainder
by hard off 16 May '06

16 May '06

i know of a long way to do this, but i think i remember hearing of an object that does division primary school style. ie, gives a whole number and a remainder. eg. 7 / 2 = 3 remainder 1 what's the object?

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Pd-list May 2006