Pd-list January 2010

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127 participants
208 discussions

[PD-announce] Solitude at "Xenakis Past, Present, and Future", Brooklyn, NY
by Hans-Christoph Steiner 28 Jan '10

28 Jan '10

As part of the Xenakis Past, Present, and Future festival in New York, I'll be talking about my piece Solitude, which is somehow inspired by Xenakis' Mycenae Alpha and the UPIC system. The conference part starts today and goes thru Saturday. I'll be speaking Saturday at 3:30pm http://bxmc.poly.edu/xenakis To listen to, see, and download the music, score and program, go to: http://at.or.at/hans/solitude/ .hc ---------------------------------------------------------------------------- "[W]e have invented the technology to eliminate scarcity, but we are deliberately throwing it away to benefit those who profit from scarcity." -John Gilmore _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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Re: [PD] object that receives "print to console" messages
by Hans-Christoph Steiner 28 Jan '10

28 Jan '10

Doh, try this: http://at.or.at/hans/pd/objects.html#hidio > .hc On Jan 28, 2010, at 3:58 AM, Ingo Scherzinger wrote: > Thank you, Hans! > unfortunately the link to the [hidio] object is not working > (localhost?). > > > That stuff is supported in the [hidio] object that hasn't been > officially released. Its in SVN, and should build on GNU/Linux and > Mac OS X. Or here's a tarball with binaries for GNU/Linux x86 and > Mac OS X 32-bit. > > http://localhost/hans/pd/objects.html#hidio > > .hc > > On Jan 27, 2010, at 10:42 AM, Ingo Scherzinger wrote: > > > Hi, > > does anybody know if I can receive the stdout that prints to the pd > console? > > I am trying to get the ID number of an hid gamecontroller / joystick > automatically at startup. I tried sending “dmesg | grep Joystick” to > the shell object which gives me the “hidraw” ID but not the one that > Pd uses. > > [print( - [hid] gives me the correct IDs but I don’t know how to get > these into pd. > > Alternatively I could use the “hidraw” ID if I would know how to > open the [hid] device with that ID. > > Any help appreciated! > Ingo ---------------------------------------------------------------------------- I have always wished for my computer to be as easy to use as my telephone; my wish has come true because I can no longer figure out how to use my telephone." --Bjarne Stroustrup (creator of C++)

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tabosc4~ and table byte reallocation
by mami music 28 Jan '10

28 Jan '10

Hi guys Im using [tabosc4~]. Acording to the documentation one should use an array of any power of 2 + 3. The extra 3 elements are for safeguard, one should go at the begining of the array (a copy of the 1st element of the vector) and the other 2 should go at the end (both of them copies of the last element of the vector). I´m using a 256 block size, so the size of my array should be 256+3= 259. Im having problems figuring out how to copy the N-2 element of the table (that is sample with index 256) to the 257th and 258th index of the table using [tabsend~] and [tabreceive~]. The only way i have come up with (that is obviously not working) is using tabread4~ to read the 256th sample and write it down on the 257th and 258th sample of the array using tabwrite~ (and that is why this whole thing is not working). I attach a basic patch that im using. Any help would be apprecieated Thanks in advance Daniel

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Re: [PD] A "multiple problem" with video playing
by tep 28 Jan '10

28 Jan '10

Thanks Iohannes So, i can conclude that the slaves local frame clocks are taken from the "local" gemhead objects, as explained in Matteo's answer ? Is it more reliable/light than using a metro on each computer (which would allow me to change the playback speed) ??? Also, for the codecs, no, i don't have raid system. And it's mostly laptops with slow drives. But i'm not sure to have some spare cpu to treat a compressed video codec. 2010/1/28 IOhannes m zmoelnig <zmoelnig(a)iem.at> > changed the subject back to the original mail... > > Marco Donnarumma wrote: > > Yep, I can confirm the same. I worked with three macs connected via LAN > and > > a simple sync via a master works very well. > > this will usually give you quite a lot of jitter, since the "now" in Pd > drifts in the audio-buffer (network jitter is probably neglectable in a > LAN, but of course you also have that), which most likely will lead to > not so smooth playback. > of course it depends on the material you want to play back. > > the solution we came up with, was to have a master frame clock and local > frame clocks on the slaves. > the slaves would adjust their framerates in order to keep up with the > master, if the lag between the master clock and the slave clocks was low > (some frames). > if the lag was too big, the slaves would "jump" to the target value. > > this worked well with several "full size" (cannot remember the actual > resolution) videos played back in sync with live and taped music over 90 > minutes or so. > > > Also, maybe someone could disagree, but in my experience not-compressed > > movies (even full DV) are lighter for the machine. > > uncompressed video is lighter for the CPU, but more load for the > harddisk. the "best" codec always depends on your system (e.g. do you > have a fast RAID-system?) > > fgmasdr > IOhannes > -- http://www.myspace.com/nicotep www.bedroomresearch.com/TEP http://nicotep.free.fr

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Re: [PD] Pd-list Digest, Vol 58, Issue 125
by Marco Donnarumma 28 Jan '10

28 Jan '10

Yep, I can confirm the same. I worked with three macs connected via LAN and a simple sync via a master works very well. Also, maybe someone could disagree, but in my experience not-compressed movies (even full DV) are lighter for the machine. M I have synced several computers on a LAN successfully using a master, > with a counter run by a [metro], sending frame numbers to the slaves via > [netsend] and [netreceive], sending the frame number to each [pix_film] > object. > > This way the master can also play audio which remains in sync, and > pausing, scrubbing etc are all possible. >

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Re: [PD] object that receives "print to console" messages
by Ingo Scherzinger 28 Jan '10

28 Jan '10

I'm gonna give it a try. Thank you! > i would suggest you to use udev rules, it is quite easy. > > for example here is a line i used for arduino to appear as > /dev/arduino_SERIALNO: > > KERNEL=="ttyUSB*", SUBSYSTEMS=="usb", ATTRS{product}=="FT232R USB > UART", > ATTRS{idProduct}=="6001", ATTRS{idVendor}=="0403", > SYMLINK+="arduino.port%n arduino_$attr{serial} > arduino_$attr{serial}.port%n", > RUN+="/bin/stty --file=/dev/arduino_$attr{serial}.port%n" > > if i remeber correct [hid] wants the minor numbers, right? > > read some udev rules example and you will figure ..if you are really in > trouble - give us a shout. > > hint: use `udevadm control --reload-rules` after you add or modified > something in /etc/udev/rules.d/ > (btw, this the new udev command syntax, they keep changing it .. > the older one was like --reload_rules and before it was something else > too ;) so beware! ) > > so using udev rules the particular device will always have the same > symlink in "/dev/". it up to you what you wanna name it .. > > > > > > Hi, > > does anybody know if I can receive the stdout that prints to the pd console? > > I am trying to get the ID number of an hid gamecontroller / joystick > > automatically at startup. I tried sending "dmesg | grep Joystick" to the > > shell object which gives me the "hidraw" ID but not the one that Pd uses. > > > > [print( - [hid] gives me the correct IDs but I don't know how to get these > > into pd. > > > > Alternatively I could use the "hidraw" ID if I would know how to open the > > [hid] device with that ID. > > > > Any help appreciated! > > > > Ingo

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[PD-announce] Pure Data Workshop+Book Sprint, Berlin
by Derek Holzer 28 Jan '10

28 Jan '10

Pure Data Workshop + FLOSS Manuals Book Sprint Tusday 23 - Friday 26 February 2010, 17.00-22.00 [GMT +1] NK Elsenstr. 52 2HH 2 Etage 12059 Berlin, Germany Contact Derek Holzer for building access: +49 176 2812 5845 / derek(a)umatic.nl Or contribute online! http://en.flossmanuals.net/puredata irc.freenode.net #flossmanuals Pure Data (or Pd) is a free + open source, real-time graphical programming environment for audio, video, and graphical processing. Because all of these types of media are handled as data in the program, many fascinating opportunities for cross-synthesis between them exist. Pd is commonly used for live music performance, VeeJaying, sound effects composition, interfacing with sensors, cameras and robots or even interacting with websites. A book sprint brings together a group of writers, editors and artists to produce a published book within several days. This sprint will combine a workshop within it, where new users will learn to create basic patches in Pd, documenting them along the way for the FLOSS Manual. This is an exciting opportunity both to acquire new skills as well as share them with others in the form of a book! This sprint is a long-distance collaboration between FLOSS Manuals, the Berlin Pure Data users group and ITP/Tisch School of the Arts, New York. Please bring your own laptop with Pure Data Extended installed. The workshop is free, with the expectation that participants will contribute to the FLOSS Manual. -- ::: derek holzer ::: http://macumbista.net ::: ---Oblique Strategy # 131: "Question the heroic approach" _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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hid osx 10_6 / channel mapping
by ub 28 Jan '10

28 Jan '10

hey there, i'm currently working with usb sensor box, that i read in PD using the [hid] object. it worked totally cool with four sensor channels, but when i added another 4, the 8th channel didn't show up. this seems to be the case, because the 8th channel gets mapped to abs_ry, while the 5th channel already gets assigned abs_ry, if declared absolute. i can change the name in source code -- and probably eventually compile it -- the problem is, that for portablity and ease of installation, the whole thing should run on a PD-extendend package. so can i work around this somehow? like, can i get [hid] to output raw channel numbers instead of symbolic names? thanks+ciao, ulrich

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Re: [PD] A "multiple problem" with video playing
by Matteo Sisti Sette 28 Jan '10

28 Jan '10

tep wrote: > I'm using a few computers to play some synced videos, but i can't get > satisfying results using pix_movie. What is that is unsatisfying? Is the playback on each computer unsatisfying by itself (in which case I cannot be of help, whatever unsatisfying means), or is the syncronization between computers that is not perfect? In this second case, "how much" do you lose syncronization, i.e., how many frames of difference between any two computers do you accumulate per minute? If you just send a "start" signal to all computer and have them play the videos, and expect them to keep synchronized just by the exactness of their clock, I think it is impossible (with whatever software or codec) to maintain an acceptable synchro (meaning no much more than a couple of frames of difference) for more than a few minutes. I once had to do a synced playback of 3 videos and, if left to drift, they could stay apparently synchronized for as long as about 5 minutes. Indeed I was surprised by GEM's "clock" stability, I didn't expect so much (well actually i did, but I had been surprised a few months earlier with a similar application). To guarantee synchro within a given tolerance "forever", I did a patch with one "master" and several (in my case 3) "slaves" where the master broadcast (via udp) its current time every N seconds (e.g. N=5) and each slave compared the received time with its own, and if the difference was greater than a threshold (e.g. 2 frames), it forced itself to skip or pause the needed amount of frames. It worked quite well. With a slightly more sofisticated patch you could correct the drift in a more gentle way than abruptly pausing or skipping a few frames. I used Windows (not sure whether xp or vista, I think xp) and DV-PAL codec. By the way, I never used pix_movie's "auto" mode: I turned it off and fed the right inlet with a counter incremented by bangs taken from the [gemhead]. But i dubt this makes any difference. Not quite sure this helps... bye m. -- Matteo Sisti Sette matteosistisette(a)gmail.com http://www.matteosistisette.com

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object that receives "print to console" messages
by Ingo Scherzinger 28 Jan '10

28 Jan '10

Hi, does anybody know if I can receive the stdout that prints to the pd console? I am trying to get the ID number of an hid gamecontroller / joystick automatically at startup. I tried sending "dmesg | grep Joystick" to the shell object which gives me the "hidraw" ID but not the one that Pd uses. [print( - [hid] gives me the correct IDs but I don't know how to get these into pd. Alternatively I could use the "hidraw" ID if I would know how to open the [hid] device with that ID. Any help appreciated! Ingo

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Pd-list January 2010