Pd-list May 2010

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visualize time/position in soundfile
by PF 17 May '10

17 May '10

hi what's the best way to visualize the elapsed time and current position while playing a sound file from an array?

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[PD-announce] gendy~ PD + Max/MSP object and libgendy 0.6.0 released
by Spencer Russell 17 May '10

17 May '10

Hi Pd-ers, I've been working off and on for a bit on a C++ library to implement a variant of Dynamic Stochastic Synthesis, a technique developed by Iannis Xenakis. (For a great history and more details check out Sergio Luque's thesis [1]. The library is still pretty rough around the edges and more or less completely undocumented, but the PD object that uses it should be pretty functional. Included with the code is a helpfile as well as a gui that should make it pretty easy to jump right in. The basic idea of DSS is to describe a waveform with a set of "breakpoints" and interpolate between them to generate the actual audio signal. The set of breakpoints forms a single cycle of a waveform, and each time one cycle gets played, the breakpoints each move for the next cycle. So each breakpoint traverses a two-dimensional random walk. One improvement I've made to some traditional DSS implementations is the use of cubic spline interpolation instead of linear, which improves the aliasing considerably. It's not a truly bandlimited signal, but is differentiable. "improves" is obviously subjective, and linear interpolation is also available by sending a "linear" message to the object. The other modification is the introduction of selectable center waveforms that the breakpoints will gravitate towards. Right now I only have flat, square, and sine implemented, but I'm planning on including basic triangle and sawtooth as well. The "h_pull" and "v_pull" controls effect how much the breakpoints are pulled towards the center waveform. The external requires Thomas Grill's Flext library. Once you have it installed simply run FLEXTDIR/build.sh pd gcc >From the base gendy directory (Where FLEXTDIR is the location of your flext install) and you should have a shiny new binary in the pd-linux directory. The arguments to build.sh will vary depending on your system, as will the directory containing the binaries. Please report any bugs to http://code.airwav.es/projects/gendy/issues/new Downloads: Source Tarball - http://code.airwav.es/attachments/download/4/gendy-0.6.0.tar.gz x86_64 PD Binary - http://code.airwav.es/attachments/download/3/gendy~.pd_linux You can also get the code with git clone http://git.airwav.es/gendy.git gendy [1] http://www.sergioluque.com/texts/luque_stochastic.pdf _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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Re: [PD] udev & usb midi interfaces
by Ingo Scherzinger 17 May '10

17 May '10

Hi Frank, I had tried assigning the devices as described in the "MultipleUSBAudioDevices" article before but I kept losing my soundcard. Now I tried it again and gave ALL midi interfaces a vendor id. This finally works! Originally I had the plan of using 2 internal midi interfaces and assign them to index 1 and 2 and leave index 3 open for an external interface to be plugged in from time to time. This does absolutely not work as any "undefined" USB midi interface grabs any of the other indexes although I have specified the maximum number one number higher so that there would be room to get an unused index number. Very strange! I guess I'll drop the idea about keeping an empty slot for an external interface. The weird thing is: now that the midi ports are being sorted out in the system pd doesn't seem to find them anymore. Even if I put the "-mididev 1,2,3" flag. I'll have to keep investigating about that. Ingo >Hi, > >On Mon, May 17, 2010 at 11:28:42AM +0200, Daniel Wilcox wrote: >> Why udev rules then ...? I use the portaudio index of the soundcard to >> pass to pd with -audiodev on startup (I use -nogui and alsa) and >> another script which parses aconnect -io to determine the alsa mdii >> index, then calls aconnect again to connect pd with the midi device. >> >> Actually, perhaps you are right as it would be nice to have udev run >> aconnect whenever my midi device is plugged in. > >If your devices are different, you can use the vendor and product ids to specify the soundcard index ALSA uses: >http://alsa.opensrc.org/index.php/MultipleUSBAudioDevices > >If you really must use udev, maybe this helps: >http://alsa.opensrc.org/index.php/Udev > >Ciao >-- >Frank

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Re: [PD] udev & usb midi interfaces
by Daniel Wilcox 17 May '10

17 May '10

> ---------- Forwarded message ---------- > From: "Ingo Scherzinger" <ingo(a)miamiwave.com> > To: "'pd-list'" <pd-list(a)iem.at> > Date: Mon, 17 May 2010 09:10:27 +0200 > Subject: [PD] udev & usb midi interfaces > > Hi, > > > > does anybody know the search path to get udev information about usb midi > interfaces? > > It should be something like “udevadm info -a -p / ??? …”. I’m not realy > sure how to search for the soundcard either. > > I was using “lshal” which gives me a lot of information but I can’t tell > which part to use for the udev device rules. > > I read Daniel Drake’s “writing udev rules” but he doesn’t mention sound at > all. > Yeah, it's easy ... try udevinfo -a -p $(udevinfo -q path -n /dev/*your device*) and plug in the device ... this command will list all the udev attributes it sees when it makes the sysfs usb tree. I use it it see what attributes I can use for writing udev rules. Drake may not explciity list "sound" or "midi" devices, but they are covered by the tutorial as well ... just find where the device is mounted in /dev and use that node in udevinfo. > I really need to write some udev rules to straighten out my 2 usb midi > interfaces and soundcard that get mixed up all the time. > Why udev rules then ...? I use the portaudio index of the soundcard to pass to pd with -audiodev on startup (I use -nogui and alsa) and another script which parses aconnect -io to determine the alsa mdii index, then calls aconnect again to connect pd with the midi device. Actually, perhaps you are right as it would be nice to have udev run aconnect whenever my midi device is plugged in. -- Dan Wilcox danomatika www.robotcowboy.com

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[PD-announce] Blocked Signal/Score Processing with Pd / + physigs
by Frank Barknecht 17 May '10

17 May '10

Hi, at LAC2010 I presented a paper on "Blocked Signal/Score Processing" or BSP with Pd. It explores ways to use Pd's signal operators for more control oriented applications to allow block-processing of control stream data that are normally dealt with by message operators and shows some examples including a physical modelling system for Pd vanilla that is similar to MSD/PMPD - and that it damn fast for a vanilla solution. Paper, slides and a video of my presentation are available at the Linux Audio Conference 2010 site: Paper: http://lac.linuxaudio.org/2010/papers/24.pdf Slides: http://lac.linuxaudio.org/2010/download/lac2010_bsp_in_pd.tgz Presentation: http://lac.linuxaudio.org/2010/recordings/day3_1045_Applications_of_Blocked… The code for the [physigs] abstraction shown there is at github: http://github.com/footils/physigs Comments welcome. Ciao -- Frank Barknecht _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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udev & usb midi interfaces
by Ingo Scherzinger 17 May '10

17 May '10

Hi, does anybody know the search path to get udev information about usb midi interfaces? It should be something like "udevadm info -a -p / ??? .". I'm not realy sure how to search for the soundcard either. I was using "lshal" which gives me a lot of information but I can't tell which part to use for the udev device rules. I read Daniel Drake's "writing udev rules" but he doesn't mention sound at all. I really need to write some udev rules to straighten out my 2 usb midi interfaces and soundcard that get mixed up all the time. Thanx, Ingo

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rewire with reason or logicpro 9
by Camilo Cadavid Corredor 17 May '10

17 May '10

Is there a way to rewire reason with pd? _________________________________________________________________ Invite your mail contacts to join your friends list with Windows Live Spaces. It's easy! http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx…

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Pd-berlin meeting next tuesday, 18th May
by João Pais 16 May '10

16 May '10

Hello, next tuesday, 18th May, will be the next meeting of Pure Data users in Berlin at NK (http://www.nkprojekt.de/) - Elsenstr. 52, 2HH 2Etage. For more information, look up http://puredata.info/community/organization/pd-berlin/pd-berlin-users-group. We also encourage you to take an active part, and put up suggestions for topics you want to talk about / topics you want to be talked about. Doors are open from 20h-20h15. After that they'll be closed, and you will have to call someone from the Pd-meeting to get in. To get a telephone number to call or confirm assistance you can write to info_at_minitronics.net. Please, don´t call to the staff of NK to open the doors. They let us use the space but we have to take care about having the meeting without producing any disturbance to them, and to clean the space after the meeting. We would apreciate if you would send us a small mail to info_at_minitronics.net with your name, Pd experience and interests, so that we know how many people might be coming. Or put your name in the pd-berlin wiki page. We would like to thank the support and willingness of NK in the organization of these events. If you wish, you can make a 2Eu donation to NK, which is an artist-run space with no government support. João Pais -- Friedenstr. 58 10249 Berlin (Deutschland) Tel +49 30 42020091 | Mob +49 162 6843570 Studio +49 30 69509190 jmmmpais(a)googlemail.com | skype: jmmmpjmmmp

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gemlist_info in pure opengl?
by punchik punchik 16 May '10

16 May '10

Hello Can anybody tell me if there is a command in pure opengl that performs the same as gemlist_info? Im trying to convert pd/gem patches into c++ and opengl and would like to know how can i make the same as gemlist_info in pure opengl thanks A.

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Both kinds of beats, drum *and* bass.
by chrism 16 May '10

16 May '10

<http://mccormick.cx/dev/DrumAndBass.zip> (1.3Mb) or bzr co http://mccormick.cx/dev/DrumAndBass/ Load up "_main.pd", turn up the volumes, and hit the red bang. Chris. ------------------- http://mccormick.cx

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Pd-list May 2010