Pd-list December 2011

pd-list@lists.iem.at

80 participants
108 discussions

[OT] SSE/MMX tips?
by Bill Gribble 06 Dec '11

06 Dec '11

I am trying to code a simple operation using SSE2 instructions where possible. I have a feeling that what I want to do is just a matter of a couple of shufps and haddps instructions but I can't get it. Lazyweb please help! The operation is integration. I have a vector of 4 single floats (v4sf) and a carry-in float to start. For example CI F0 F1 F2 F3 5 1 0 10 -5 Yields F0 F1 F2 F3 6 6 16 11 So far iteration on plain floats seems to be the best I can come up with, but HADDPS is tantalizingly close to what I want to do. Any hints? Thanks, Bill Gribble

4 10

[expr] license issue (update)
by i go bananas 06 Dec '11

06 Dec '11

just a quick update on the behind the scenes work i have been doing to see if we can get [expr] under the BSD license. Firstly, i have been in contact on several occasions with Apple, in regards to their position on LGPL software in their apps. They have really given me the runaround, and even after many mails and calls to different departments, my request of a yes/no answer on LGPL has always left me simply being shoved off to another department, who won't give me a yes/no either. They are basically telling me that if i need to know this simple fact, that i need to hire a lawyer. Which is ludicrous. So, that's the "discouraging" news. The not so discouraging news, is that i have spoken with a few people involved with the jMax software, upon which the expr code is based. I have of course, also been speaking with Shahrokh Yadegari, and the good news is that i have yet to speak to anyone who is not in favour of helping with a change to the BSD license. In the best case, we might be able to get permission for the applicable jMax code to be relicensed under the BSD. This would mean that no code re-write would be necessary, and the change to BSD would be quite smooth (hopefully!) Anyway, it's a slow process, waiting for email replies, and then sending off the next mail...but there appears to be some light coming from the end of the tunnel. We're just not exactly which source that light comes from right now, but hopefully all will clear up eventually. I doubt we'll be able to get this matter fully resolved by the end of this year, but hopefully when the winter break is over we can see more clearly what steps need to be taken.

5 10

[PD-announce] MetaminaFNR >> A Tasty of Small Signals
by oskoff lovich 06 Dec '11

06 Dec '11

hi All! i would like to share the new programmation of mEtamina Free Net Radio here, also the Pd code is available for dowload.. enjoy !! ----------------------------------------------------------------------------------------------------------------------- MetaminaFNR >> A Tasty of Small Signals (English below) ----------------------------------------------------------------------------------------------------------------------- Desde metaminaFNR presentamos nueva programación, despues de la emisión durante el pasado mes de mayo del compilado en doble cassette "Madrid es Ruido" del sello "For Noise's Sake", tras algunas emisiones clandestinas y la búsqueda de un nuevo server donde alojarnos temporalmente, el mes de diciembre lo dedicaremos a la escucha de este magnífico proyecto sonoro "A Tasty of Small Signals" editado en DVD por el sello STÖRUNG (Barcelona) y el Centro Puertas de Castilla (Murcia) y comisiariado por Francisco López. 91 microcomposiciones de 2 minutos realizadas por 7 artistas internacionales: James Webb, Lawrence English, Francisco López, Asmus Tietchens, Louis Dufort, Alan Courtis y Zbigniew Karkowski. http://www.sonm.es/index.php?option=com_content&view=category&layout=blog&i… http://storung.com/media/publicaciones/str008_official_review.pdf Queríamos emitirlo de forma especial y extender las posibilidades que el código y los nuevos formatos de emisión radiofónica en tiempo real por internet (live stream) nos ofrecen. Para ello hemos desarrollado un script en "Pure Data" que irá mezclando entre sí las 91 microcomposiciones de forma variada, siguiendo diferentes distribuciones de probabilidad (cadenas de markow) que hemos asignado a cada fragmento, con lo que podremos escuchar diferentes versiones y estructuras de la mezcla segun el dia y hora e el que nos conectemos a la emisión. Audio stream url: http://suservidor.servideo.org:8000/metaminaFNR.ogg web: http://metaminafnr.hotglue.me/ ----------------------------------------------------------------------------------------------------------------------- MetaminaFNR >> A Tasty of Small Signals ----------------------------------------------------------------------------------------------------------------------- mEtaminaFNR introduce a new programming, after the emissions during the last May of the double cassette compilation "Madrid is Ruido" released by the label "For Noise's Sake ", after some clandestine broadcasts and the search for a new server where to stay temporarily. In December we will be devoted to listening the great project "A Tasty of Small Signals" edited on DVD for the label Störung (Barcelona) and the Centro Puertas de Castilla (Murcia) and curated by Francisco López. 2 minutes 91 microcompositions made by 7 international artists: James Webb, Lawrence English, Francisco López, Asmus Tietchens, Louis Dufort, Alan Courtis y Zbigniew Karkowski. http://www.sonm.es/index.php?option=com_content&view=category&layout=blog&i… http://storung.com/media/publicaciones/str008_official_review.pdf We wanted to stream it in a special way and work on the possibilities of the code and experiment with new broadcasts formats. For that we are developed a script in “Pure Data” which will mix up the 91 microcompositions “on the fly”, following different probability distributions (Markov Chains) assigned to each of the fragment, so we will listen different versions and structures of the mixer depending on the day and time. Audio stream url: http://suservidor.servideo.org:8000/metaminaFNR.ogg web: http://metaminafnr.hotglue.me/ -- -- oscar martin && [noish] ::::::::::::::::::::::::::::::::::::::::::::: http://noconventions.mobi/noish http://metaminafnr.hotglue.me/ http://www.minipimer.tv/ http://ursonatefanzine.tk/ --------------------------------------------- _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

2 1

[state] object examples
by José Rafael Subía Valdez 05 Dec '11

05 Dec '11

Hello to al the Pd-mailing list, I wanted to study the [state] object from de [ggee] library but it doesn't come with a help file.. I've been trying to figure out how it works but no luck. Does anyone know how it works, or maybe has some help files. maybe G. Geiger could answer thank U -- Lic. José Rafael Subía Valdez SoundArtist www.myspace.com/joserafaelsubiavaldez https://puredata.info/author/rafasubia www.redce.org www.facebook.com/JRafaelSubiaValdez

1 0

Re: [PD] Audience object
by rosh samarawickrama 05 Dec '11

05 Dec '11

Hi all My name is rosh and I'm a newbie to puredata. Im very glad that I have been introduced to this program as the active development of this software is open source, making it a sharing community not a competitive one. My question to you all is, In the audience object, are there messages you can send it to move the sources ( s1,s2,s3,s4) ? Rosh

2 1

droidparty_save_record let's do a tutorial
by berenger recoules 04 Dec '11

04 Dec '11

Hello, I'm trying to get the save and record mechanisms to work on android with PdDroidParty. I made a simple patch to try and get the several abs needed to work. Basically you have a few Gui objects to manipulate and their values should be saved to the SDcard when you press save from android menu. Using the [menubang] abstraction makes an image appear in the android menu of PdDroidParty, when clicking on it nothing happens. I've put the whole thing into the attached patch, this could be the start of tuto on how to do this, since I copied Chris' code from CanOfBeats (in which everything works fine btw) and inserted comments, trying to explain the way it works (as I have understood it). I don't get why the reproducing of the code doesn't work, I must have missed something. Please help :) Bérenger

2 1

GEM's minimum requirements
by Nicola Pandini 03 Dec '11

03 Dec '11

Hi list! I'm trying to use an old laptop with a Celeron 2,6Ghz to playback some videos with a basic GEM chain (pix_film, pix_gain, pix_texture), but the performances are very poor. It's only due to the crappy celeron :-) ? What are the minimum requirements to play a video with GEM? Is there any optimization possible, like using videos encoded with a lighter video codec, or something like this? I'm using Debian with open video drivers (ATI dropped the support for the laptop's video card). Thanks! -- Nicola

6 8

Findings regarding performance
by Roman Haefeli 02 Dec '11

02 Dec '11

Hi all Lately I was asking myself if some of own patching practices regarding performance optimization were justified or based on some wrong beliefs. I often use [*~ ] as on/off signal gates and now started be concerned about using an object that performs a relatively complex task (multiplication of two floating point numbers) for such a simple task. I imagined that an object that either outputs a copy of the input or outputs zeros would be a less expensive on/off signal gate than [*~]. I created an abstraction containing this: [inlet~] [inlet] | | | [switch~ ] | [outlet~] Let's call this abstraction [gate~ ]. It turned out to work as supposed. But is [gate~] really cheaper than [*~ ]? I made a test by connecting lots of [gate~]s to a chain and measure the CPU usage. For simplicity reason, let's just use an invented arbitrary unit for expressing the CPU time (ct) consumed by an object. It turned out that [gate~] uses 0.52ct when it is on and 0.4ct when it is off. But how much does [*~ ] use? No matter whether turned on or off, [*~ ] uses a stable 0.39ct. The relatively complex multiplication is _not_ more expensive than the on/off implementation with [switch~ ]. Even when turned off, the [switch~] approach is still more expensive. But the really interesting finding comes now. [*~ 0] has only 0.2ct! Almost the the ct value of a plain [*~ ] halved! It also doesn't matter what value the argument has. The plain fact of specifying an argument makes [*~ ] a lot cheaper. I also tested [/~ ], [+~ ] and [-~ ] and the same applies for those. They all have 0.39ct without argument and only 0.2ct with an argument specified. Depending on the kind of patch, this allows for quite a significant performance improvement. I also measured the ct of a [*~ ] when a signal wire is connected to the right inlet. It costs exactly as much (0.39ct) as when sending messages to the right inlet of a [*~ ] without argument. My interpretation is that [*~ 0] and [*~ ] are two different objects. The latter always performs a calculation with two signals and implicitly converts a message on the right inlet to a signal, where the former really only deals with messages on the right inlet (and thus is cheaper). On a completely different note, I wanted to know if it costs anything to have signals entering and leaving subpatches and abstractions a lot, respectively if [inlet~] and [outlet~] add some overhead in CPU time. I chained tens of thousands subpatches together and it seems that does not consume any additional CPU time at all. The values for [inlet~ ] and [outlet~] are much below 0.01ct. I haven't tested the cost, when more than one signal wire are going to an [inlet~], though. Roman

7 16

Any useless/fun gui plugins around?
by Dan Wilcox 02 Dec '11

02 Dec '11

Howdy all, I was showing a friend the new pd gui plugins and he suggested one that causes the patch wires to vibrate/wiggle based on the amount of messages being sent. How hard would it be to code such a plugin? Yeah, it'd be kind of useless but totally fun! Are there any plugins floating around in a similar vein? -------- Dan Wilcox danomatika.com robotcowboy.com

4 4

Re: [PD] unwanted blur with gemframebuffer and pix_buffer
by Marco Donnarumma 01 Dec '11

01 Dec '11

> > > > If you have the time to check the patch, any help is appreciated. > > Just load an image and toggle to switch between normal rendering and > > [pix_buffer]ed scene. > > > > does the attached patch make any more sense to you? > Yes, indeed. I had only tried to change the size of [pix_snap] ignoring completely the [gemframebuffer] one and obviously got weird effects. thanks! M > > fgmasdr > IOhannes > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.11 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > -- Marco Donnarumma Independent New Media and Sonic Arts Practitioner, Performer, Teacher ACE, Sound Design MSc by Research (ongoing) The University of Edinburgh, UK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Portfolio: http://marcodonnarumma.com Research: http://res.marcodonnarumma.com | http://www.thesaddj.com | http://www.flxer.net Director: http://www.liveperformersmeeting.net

1 0

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

Pd-list December 2011