Pd-list March 2005

pd-list@lists.iem.at

166 participants
274 discussions

(yet another) data structures tutorial
by ggkarman＠musicologia.com 21 Mar '05

21 Mar '05

Hi friends, Ive just uploaded a new data structure tutorial to the community page. https://www.puredata.info/Members/ggkarman/Tutoriales/ The document's language is spanish, but has got quite a few illustrations for those non-spanish speakers interested in it. The tutorial was used in a workshop in Madrid a couple weeks ago. The level is quite basic but might have some nice tips. By the way, there were around 25 attendants to the workshop, (8 fem). I would say 3 or 4 already were users. Hope some more now. greg.

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streaming with Gem
by sl1200mk2＠free.fr 20 Mar '05

20 Mar '05

hi dears... is it possible to stream a Gem chain via netsend or [osc] to another computer. because gem chains are cool thanks nicolas

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PDa update/buglist/comments
by derek holzer 20 Mar '05

20 Mar '05

Hi Guenter + the list, Guenter put up a new beta of PDa + Tcl/Tk libs for the IPAQ yesterday, so I tested most of the afternoon. And here's the bugs/comments of the day, as I discovered them. I'm using the latest PDa, Tcl and Tk packages from: http://gige.xdv.org/pda/release/familiar/ with Familiar 0.8.1 on an HP IPAQ 5550, in case anyone's interested. Check the dates rather then the versions of the packages against what you have installed, as Guenter updated them yesterday without changing the version numbers. I would tentatively recommended upgrading for anyone who's running it right now due to better oscillator sound, math operations and conversion routines. Major Tcl/Tk bug under IPAQ which piled all the text in the upper left corner is fixed. However, I've found the GUI in general more prone to crashing on "problem objects" (i.e. tables, numberboxes and [vcf~]) than before...see below for details. BUGS CHECKED TODAY/COMMENTS: * [dbtorms], etc: You note: "conversion routines (dbtorms,mtof, etc) are only available for control flow", but I'm not sure what you mean by this... * I just checked [dbtorms], [rmstodb], [mtof] and [ftom] in the latest versions and they appear fine. * GUI window Audio Peak Meters: non-functional until DSP is switched off, then they flash a red "100". * GUI number boxes: will freeze GUI/crash PD if updated too frequently. Output of single [env~] object is sometimes enough to do this! Is there anything native in PDa to limit the refresh rate of the numberbox? * GUI tables/graphs: updating graphical tables also risky. [metro 1000] to a [tabwrite~] could be enough to crash PD. * [vcf~]: You note: "vcf~ could be improved in quality". Agreed! Sound improved from previous version, which was largely unresponsive to frequency changes, but this object has possibility to freeze GUI + kill audio at unknown times. Prints "0.000141" to the terminal for no known reason. * [lop~], [bp~] and [hip~] function as expected. * [routeOSC]: does not create. * [dumpOSC]: creates as expected. * [sendOSC]: does not create with following error: /usr//lib/pd/extra/sendOSC.pd_linux: /usr//lib/pd/extra/sendOSC.pd_linux: undefined symbol: OSC_errorMessage * [netsend] + [netreceive]: work as expected. * [vd~]: does not create. * Other delay/table objects such as [delwrite~] + [delread~] and [tabwrite~] + [tabread~] don't seem to be different, except as you have noted: "tabread~ and tabwrite~ are indexed in milliseconds instead of samples". * You might also mention in the docs that [soundfiler] exports length in ms not samples here as well. *Probably the interpolation of [tabread4~] is not available here in Fixed-Point-land? * [sfread~] + [sfwrite~]: you write: "The readsf and writesf objects are replaced by sfread and sfwrite", but you might clarify that these need tildes in the names: [sfread~], [sfwrite~]. * Lots of clicks n' cuts when using the GUI with oscillators, etc. But you knew that already as well! OTOH, it seems to respond nicely to the -rt flag, making operation much much smoother. * Filters and (especially) oscillators sounding much better than before. [osc~] in particular gave a very nasty, distorted rectangle wave in the previous version I tested: https://puredata.info/Members/derek/PDa.osc.1.png/image_view_fullscreen * Also, you might include my directions for remote X11 forwarding in your FAQ. * Will check audio recording with [sfwrite~] later on. Audioplayback with [tabread~] works as expected, haven't checked [sfread~] yet. * Object requests: * [shell]: Ggee * [wrap]: Cyclone * [makesymbol], [date], [time]: Zexy thx + best, derek -- derek holzer ::: http://www.umatic.nl ---Oblique Strategy # 147: "State the problem as clearly as possible"

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pdp-pidip:recording to video files
by Bill Sack 20 Mar '05

20 Mar '05

hello to all, is it possible for the pdp_rec~ object in pidip to record at a larger dimension than 320x240? i've tried passing packets of a larger scale to it, and it still makes movies of 320x240. i poked around in the source for the object: it seems like it would accept some kind of messages for setting the scale of the movie, but rather than blindly flail in the dark i'm asking those who might actually know! on a related subject: can anyone suggest a way to record pdp video stream in a way that can be synced with a a simultaneous audio stream? i've noticed (on my machine, anyway) that pdp_rec~ drops enough frames that a/v sync goes out pretty quickly. has anyone experimented with anything else (e.g.: streaming out through pdp_live~ to a separate recordng app). i'm looking for a cheap way to archive live audio/video happenings (so recording onto external dv through s-video is not really an option right now). thanks, bill -- _________ Bill Sack wsack(a)acsu.buffalo.edu ----------------------

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Re: [PD] feedback control
by robertgarvin＠bellsouth.net 20 Mar '05

20 Mar '05

I forgot to mention that I am using a laptop, and the microphone is built in... but currently i have the sound being re-routed into my stereo...

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Question about arrays on 64-bit
by thewade 20 Mar '05

20 Mar '05

Hello list! I was wondering if someone could explain why arrays in PD on 64-bit machines are messed up? I see in the bug on sourceforge that there are a couple of sub-optimal ways to solve this: what does that mean? Shouldnt it be as easy as changing the array pointers from int to long? (I havent looked at the code and I think that I would just get lost if I did. Im not very good at programming.) Thanks for the explination in advance! -thewade

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feedback control
by adam armfield 20 Mar '05

20 Mar '05

as far as i can see, if you're mic is selected to record in your computers mixer but playback is muted, then it shouldn't feed back.... as long as you are not routing the adc to the dac to play back directly, i think if you are using it as a control signal or recording into arrays then playing that back then it should be ok.... if you're looking for direct monitoring or output from the mic without feedback then you could try repositioning your mic and speakers... or wearing headphones.. hope this helps adam Send instant messages to your online friends http://uk.messenger.yahoo.com

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[GEM] writing a single pixel data in a texture
by Davide Morelli 20 Mar '05

20 Mar '05

parser Elementi decorativihi list, I would like to write a pixel from an image to a pix_texture. ..something like 04.pix/10.PixDataSimple but I would like to draw on a texture instead of directly on GemWin I think the skeleton should be |pix_image| | |pix_data| | ? - store the data somehow... | |pix_set| | |pix_texture| but I can't figure out how to menage the stored data.. Being a total newbie, before getting a headache with fitting and peeking in a table I wonder if there is a pix_ object for doing something similar.. If not: what external can help me writing in a particular position of a float list and how to read the whole list for pix_set? thanks, davide

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Re: WebCamera Input to GEM
by David McCarthy 20 Mar '05

20 Mar '05

Hello List, >From anyones experience, could anyone please reccomend me a webcamera which has low noise at low light levels? I think firewire is the way to go, for example the "iBOT firewire" as it is just a straight AVI data transfer format (no data compression at the camera like USB1.1) (as far as I'm aware) Naturally the compression would cause a problem in terms of noise, unless I'm mistaken. I'm not sure what the story is with USB2.0, whether it compresses the video stream or not, but I would really like to know this, as firewire webcamera's are virtually impossible to buy in the shops here in Éire... I also heard from this list that CCD devices are less noisy compared to CMOS...Is that true? Any information would be greatly helpful and appreciated I need that low noise solution! All the best, and Thanks, David I'm using pd/gem with winxp and 98se (on two diff. machines)

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gem & cinepak video on linux
by Tim Blechmann 19 Mar '05

19 Mar '05

hi all ... i'm currently working with a gem patch to play back videos files encoded with the cinepak format on linux ... i'm using pix_film (gem-0.90), aviplay and iccvid.dll ... but somewhere there is a memory leak (not sure, where), that makes the machines crash after 20 to 30 minutes, because it goes out of memory ... any idea, what's the source of that? and what's the prefered (most stable, hq) video codec for linux ... thanks .... tim -- mailto:TimBlechmann@gmx.de ICQ: 96771783 http://www.mokabar.tk latest mp3: kMW.mp3 http://mattin.org/mp3.html latest cd: Goh Lee Kwang & Tim Blechmann: Drone http://www.geocities.com/gohleekwangtimblechmannduo/ After one look at this planet any visitor from outer space would say "I want to see the manager." William S. Burroughs

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Pd-list March 2005