Pd-list October 2008

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109 participants
170 discussions

Re: [PD] pd -nogui, connecting/disconnecting from soundcards
by Dan Wilcox 24 Oct '08

24 Oct '08

On Wed, 2008-10-22 at 08:37 +0100, Claude Heiland-Allen wrote: > > but i don't know if it will work at all, pd only seems to scan for > soundcards when it starts (which i think is a bug); so you'd have to > start pd with it plugged in, then probably have to switch pd to/from the > non-usb soundcard before/after replugging the usb Pd seems to just ask alsa each time, so if I plug in the USB card while pd is running it appears in the audio menu. My initial plan is to use udev to + pdsend to switch to the external card when it is plugged in and to switch back to the internal card if it's unplugged. I don't the internal card, but it;s there so I might as well use it as the default sink. I'll try it tonight and see. I'm sure I will need to have a button to press that switches the audio cards in pd before I unplug the USB card .... but it would also be nice to know it would work if I'm jumping around and the usb cable falls out or something. Not a problem on a laptop I know, but I don't play with a laptop. The whole plan is to have the wearable/headless computer a hotpluggable pd machine. Thus far, I have had to manually run startup scripts before a show. I'd rather event script everything, test the hell out of it, and then be able to strap it on boot and play. It has a Compact Flash slot which I am going to make hotpluggable for pd patch sets. > i'm not sure if any app behaves nicely when you abruptly unplug hardware > that it is using - there might be a way to handle it in the ALSA plugin > layer, but the ALSA wiki doesn't look promising... I've been using pd+jack in the past, but I think I will try alsa. Pd does work with Alsa in Ubuntu hardy if you kill Pulseaudio. The worst case scenerio is to have to kill pd and restart it each time, but even that would not be so bad as long as I write some sort of state setting now and then that the main control patch load on a crash. > > > .hc > > > > On Oct 20, 2008, at 1:31 PM, Dan Wilcox wrote: > > > >> > >> In Ubuntu ... > >> > >> When running pd with -nogui as a daemon, can I send messages to > >> connect to and disconnect from a soundcard? I want to be able to hot > >> plug my usb soundcard without having to stop and start pd each time, > >> if possible. > >> > >> --- > >> Dan Wilcox > >> robotcowboy.com --- Dan Wilcox robotcowboy.com

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Re: [PD] [ot] PhD, mostly artistic
by Koray Tahiroglu 24 Oct '08

24 Oct '08

Hello Thomas, I have been conducting doctoral research at Media Lab University of Art and Design Helsinki since 2004. The content of my research matches almost all the keywords you mentioned. Artistic point of view probably will lead you follow artistic and more experimental methodologies. Combining your studies and knowledge with artistic practices are quite new comparing to general scientific ones, therefore not all the institutions are willing to offer these as doctoral research methodologies. Almost all the Nordic countries, ( I know at least Finland-Sweden-Denmark) and UK give full program to artistic research projects. Here in Helsinki institutions are also well integrated among each other, if you are studying at one place, you can easily attend any seminars in another places and use their facilities. It is your responsibility to find who will supervise to your research. He/she does not need to be from Finland at all, but they would probably recommend you to have at least one of your supervisors from Finland to maintain regular meetings. Helsinki is cold and dark but, New Media, experimental music has its own valuable scene here both in academic and artistic means. There are also lots of Pd-people in Helsinki, not that much in touch with each other, but using Pd heavily in their projects :) If everything will go fine, I might have my defense day in this December, and I will move back to Helsinki as well to work further on my things :) good luck with your PhD prog-search, Koray ------------------------------------- M.Koray Tahiroglu Media Lab,TAIK http://mlab.taik.fi/~korayt tel: +358 50 939 0233 (in Finland only) tel: +90 533 712 8245 On Oct 24, 2008, at 1:00 PM, pd-list-request(a)iem.at wrote: > Message: 4 > Date: Thu, 23 Oct 2008 17:26:11 +0200 > From: Thomas Grill <gr(a)grrrr.org> > Subject: [PD] [ot] PhD, mostly artistic > To: pd list <pd-list(a)iem.kug.ac.at> > Message-ID: <47C0A15C-D8FF-46E8-9319-1AB385FDD2D7(a)grrrr.org> > Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed > > Hey all, > since i'm planning to start a PhD in the near future i'm trying to > figure out which institution would fit best to my (currently rather > blurry) intentions. > I'd like to research real-time interaction with electronic media > (emphasis on music), mostly from an artistic point of view. > Keywords would be digital representation of musical structure > elements/intentions/ideas, interaction with other performers, > improvisation/anticipation, interfaces of the physical to the virtual > world, etc. > Media and music/art theory would be important, media technology > should _not_ be the main focus. It would be great if the supervisor > is an active, renowned artist or specialized theoretician. > Europe would be preferred, overseas possible nevertheless. > > any pointers? > many thanks, > Thomas

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Re: [PD] 'pure' pd DSP abstractions wanted!
by Mitchell Turner 24 Oct '08

24 Oct '08

Jamie, Here are two abstractions that may be useful to people. The first allows easy communication between the ReMOTE ZERO SL by Novation and Pd. I've included the abstraction plus a file called PureData.syx which must be up loaded to the ReMOTE ZERO (the file tells the ReMOTE ZERO which CCs to assign to each button or dial). The other abstraction allows one to use the Roland GR-33 as a flexible MIDI foot pedal with Pd. The four pedals of the GR-33 normally send program changes only (at least as far as I could tell). I've simply remapped the program change messages to trigger bang objects. Similarly, the Expression Pedal sends CC1, CC4, or CC7. I've routed these CCs to a single number box. The CC-SA license seems to make the most sense for both of these abstractions. Mitch On Aug 29, 2008, at 6:26 PM, Jamie Bullock wrote: > > Hi Mitch, > > To me GPLv* seems like a poor fit for a Pd patch or collection of > patches. GPL is more appropriate for compiled code, or compiled byte > code, where it is possible distribute 'the program' in binary form > (which is not possible with Pd patches). > > If you want to place some restrictions on your patch like 'you can do > what you like with this so long as you give me credit', or 'you can do > what you like so long as you share your changes', perhaps try one of > the > creative commons licenses: > > http://creativecommons.org/ > > The CC-SA and CC-BSD seem quite appropriate for Pd work to me. > > HTH, > > Jamie > > > > On Fri, 2008-08-29 at 16:08 -0400, Mitchell Turner wrote: >> Jamie, >> Had not though about a license. Do you have a suggestion? GPLv3? >> Mitch >> >> >> >> On Aug 29, 2008, at 7:50 AM, Jamie Bullock wrote: >> >>> On Fri, 2008-08-29 at 07:38 -0400, Mitchell Turner wrote: >>>> Jamie, >>>> I'm not sure this fits in with your project. I have an abstraction >>>> that allows easy interface between Pd and the REMOTE SL Zero >>>> (Novation). >>>> >>>> >>>> Let me know if you want to include it or take a look at it. >>> >>> That sounds really great! So long as it doesn't require any >>> externals, >>> or it could easily be adapted to not use externals, I am interested. >>> BTW, although I asked for 'DSP' abstractions, I'm really looking for >>> anything that provides a useful 'higher level' functionality, and >>> this >>> nicely fits the bill! >>> >>> Please feel free to send it either privately, on list, or via the >>> web, >>> and let me know what license you would consider it to be covered by. >>> >>> thanks, >>> >>> Jamie >>> >>> >>> -- >>> www.postlude.co.uk >>> http://www.linkedin.com/in/jamiebullock >>> >>> >> > -- > www.postlude.co.uk > http://www.linkedin.com/in/jamiebullock > >

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Re: [PD] [Gnome/Ubuntu] Gem video on external screen
by Simon Wise 23 Oct '08

23 Oct '08

On 23 Oct 2008, at 1:46 PM, Martin . wrote: >> you will probably need to set xorg for two separate displays, and >> one of >> these can be 3D accelerated, I usually start pd with Gem from the >> display >> with the projector, and control it with another pd started on the >> other >> display. This has worked well with 4 screens from 2 NVIDIA cards >> uswing >> debian, I guess it would be also ok with an intel chipset, as it >> does not >> rely on twinview or any other fancy graphics stuff. Alternatively >> I believe >> Gem can open a gemwin on a different display to the one pd was >> started on, >> check the list archives as I have not tried this. >> > > Ah, that sounds right - do you know achieve 3D rendering on "one" of > the displays? As mentioned, my xorg.conf is set as a big virtual > desktop shared between two screens..: exact details will depend very much on the graphics card and driver, but you should aim for the projector display to be the first, or primary, display, possibly use xorg.conf to turn on direct rendering for that one and off for the other. With NVIDIA most of this can be done with the driver GUI. Then either start pd from that display or give gemwin the appropriate message - I forget what it is but it was on this list a few weeks ago. simon

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pd -nogui, connecting/disconnecting from soundcards
by Dan Wilcox 23 Oct '08

23 Oct '08

In Ubuntu ... When running pd with -nogui as a daemon, can I send messages to connect to and disconnect from a soundcard? I want to be able to hot plug my usb soundcard without having to stop and start pd each time, if possible. --- Dan Wilcox robotcowboy.com

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simple looped additions and subtraction renders wrong results
by Lao Yu 22 Oct '08

22 Oct '08

Hi, I'm still playing around with Miller-Puckette's example patches. I changed one and a repeated addition or subtraction of 0.1 renders numbers with 5 positions behind the comma. I wouldn't know why that is so. Any explanation -even short- is appreciated. Jurgen

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pure-pd default creation argument mechanism
by Damian Stewart 22 Oct '08

22 Oct '08

hey, i've built a [d-default] object which provides default arguments in case creation arguments aren't specified. eg if you want $2 to have a default value of 0.5, you can just say [d-default $2 0.5] - then if $2 is specified, it will output $2 on load, otherwise it will output 0.5. have a look at [d-default-help] in the attachment to my previous message (subject 'd-triad, d-note, ..') for an example. at the moment, though, there is a problem, which is that the way the defaulting mechanism works, you cannot override a non-0 default value with 0, since '0' is the value that $-arguments get if they are not specified. i've tried replacing this with symbols. i want to get around this, if possible, because it would be nice to be able to override non-zero arguments with zeroes. now, basically, inside [d-default] it works like this: [loadbang] | [f $1] | [== 0] | [sel 1 0] | | [f $2] [f $1] | _____/ |/ [outlet] i tried replacing with symbols (as in [d-default-symbol]) (thanks to Chris McCormick for this): [loadbang] | [symbol $1] | [select $1] | | | [bang( | | [f $1] [f $2] | ________/ |/ [outlet] but this doesn't work with overriding non-zero with zeroes either.. any advice appreciated :-) cheers d -- damian stewart | skype: damiansnz | damian(a)frey.co.nz frey | live art with machines | http://www.frey.co.nz

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GEM Depth of Field
by Martin Eckart 22 Oct '08

22 Oct '08

Hi all, I'm sort of a GEM n00b but have the basic understanding down. For a project I'm working on it would be wonderful to have an effect that simulates depth of field (blurry foreground, focused background and vice versa). >From what I've read about GEM through tutorials and google searches, there's no simple object to do this. The best explanation I've found so far is http://glprogramming.com/red/chapter10.html (search for dof.c) which provides c code for producing this effect using the accumulation buffer. Now I'm pretty determined to get this to work. As I see it, my strategies for now could be a) have someone else tell there is already a simple object/patch that does this b) try to build a patch that can mimic the code c) use the c code from that example to build an external that does this or d) try and fake it some other way (manually blur images or something). I'm leaning toward c since I think it could probably be used by others in the future. I've never done openGL programming and my skills in building externals aren't great but this seems worthwhile to do for myself and probably others who might use the effect. Thoughts? Help? Strategies? Cheers, -martin

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Re: [PD] pdp_v4l2 with MacBook Pro 4th iSight on Ubuntu (no success)
by ydegoyon 22 Oct '08

22 Oct '08

ola, in the SVN ( in th etrunk, not any branches ), anyway this particular source is here also, if you want to compile it as standalone. ciao, sevy olsen wrote: > thanks senor! > just one stupid question - where do i find the actual pidip sources? > no linkage on http://ydegoyon.free.fr/pidip.html > thanks&salutis > olsen > > > ydegoyon wrote: >> it's not the right version of pdp_v4l2, >> and i think this one should be removed, >> pdp_v4l2 has been improved and integrated in P.i.D.i.P. >> with the right authorship ( e.g. Lluis Gomez and I ) >> >> so you'd better install this one. >> >> saludos, >> sevy >> >> olsen wrote: >>> buenas >>> on the macbook penryn(4th generation?) i can't report a success so >>> far - running ubuntu hardy with luvcview the camera works. with >>> pdp_v4l2 there's only a marsy green window flickering with the >>> initialization of the camera... >>> i compiled the pdp_v4l2 as mentioned on: >>> http://hangar.org/wikis/lab/doku.php?id=start:puredata_pdvjtools >>> output errors this: >>> VIDIOC_S_FMT error 22, Invalid argument >>> the format 1 message didn't change anything on the image >>> thanks for hints & greets >>> olsen >>> >>> >>> >>> >>> >>> Hans-Christoph Steiner wrote: >>> >>>> Hey, >>>> >>>> Sergi and I just figured out how to use the macbook pro iSight >>>> camera with pdp_v4l2, so I thought I just post here how for the >>>> record: By default the iSight with pdp_v4l2 seems to use MJPEG >>>> colorspace, so I was getting a "pdp_v4l2: unsupported color model" >>>> error. >>>> >>>> We sent the [format 1( to get the YUYV space, as reported in the >>>> Pd window, and it works! >>>> >>>> .hc >>>> >>>> >>>> ------------------------------------------------------------------------ >>>> ---- >>>> >>>> I spent 33 years and four months in active military service and >>>> during that period I spent most of my time as a high class muscle >>>> man for Big Business, for Wall Street and the bankers. - >>>> General Smedley Butler >>>> >>>> >>>> >>>> _______________________________________________ >>>> Pd-list(a)iem.at mailing list >>>> UNSUBSCRIBE and account-management -> >>>> http://lists.puredata.info/listinfo/pd-list >>>> >>> >>> >> > #N canvas 508 213 927 686 10; #X obj 35 20 metro 40; #X msg 87 -19 stop; #X msg 35 -19 bang; #X msg 207 -159 open /dev/video0; #X msg 207 -135 open /dev/video1; #X text 339 -162 you can choose the input device using the 'open' message. the default is /dev/video0; #X msg 207 -110 close; #X text 347 -110 closes the video port; #X msg 208 -84 dim 320 240; #X msg 208 -61 dim 640 480; #X floatatom 209 -28 5 0 0 0 - - -; #X floatatom 212 137 5 0 0 0 - - -; #X msg 212 161 freq \$1; #X floatatom 273 137 5 0 0 0 - - -; #X msg 273 161 freqMHz \$1; #X text 317 135 sets the v4l tuner frequency (in v4l units and MHz) ; #X text 325 253 pdp_v4l2 is an interface for video 4 linux 2 devices ; #X text 324 268 it's very similar to pdp_v4l but should support more recent cameras \, if it doesn't with yours report bugs to ydegoyon(a)free.fr ; #X obj 96 247 pdp_v4l2; #X text 321 202 creation arguments: <input device>; #X floatatom 210 20 5 0 0 0 - - -; #X msg 210 40 format \$1; #X text 294 18 sets the pixel format (like YUYV \, RGB32 \, ...); #X msg 209 -8 input \$1; #X text 293 -30 sets the v4l input (like camera \, tuner \, svideo \, ...); #X text 292 -19 see initialization phase for valid inputs; #X text 297 69 sets the video standard ( for tuner cards ); #X text 294 29 see initialization phase for valid formats; #X text 297 81 see initialization phase for valid standards; #X floatatom 213 71 5 0 0 0 - - -; #X msg 213 91 standard \$1; #X obj 96 300 pdp_xv; #X msg 179 299 cursor 1; #X msg 167 271 posdim 0 0 1440 800; #X text 324 303 authors : Yves Degoyon and Lluis Gomez i Bigorda; #X text 325 317 code was inspired by pdp_v4l by Tom Schouten and xawtv by Gerd Knorr; #X connect 0 0 18 0; #X connect 1 0 0 0; #X connect 2 0 0 0; #X connect 3 0 18 0; #X connect 4 0 18 0; #X connect 6 0 18 0; #X connect 8 0 18 0; #X connect 9 0 18 0; #X connect 10 0 23 0; #X connect 11 0 12 0; #X connect 12 0 18 0; #X connect 13 0 14 0; #X connect 14 0 18 0; #X connect 18 0 31 0; #X connect 20 0 21 0; #X connect 21 0 18 0; #X connect 23 0 18 0; #X connect 29 0 30 0; #X connect 30 0 18 0; #X connect 32 0 31 0; #X connect 33 0 31 0;

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Fwd: Intrepid repo seems to be broken
by Lukasz Jastrzebski 22 Oct '08

22 Oct '08

Hi all! I wanted to install pd-extended. I've added the repo to my sources. Package manager reported no "Packages.gz" file in this repo. Am I having problems? Or is there something missing? Don't know Cheers, Luke

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Pd-list October 2008