Pd-list October 2008

pd-list@lists.iem.at

109 participants
170 discussions

digital write problem in Pduino
by Derek Holzer 25 Nov '08

25 Nov '08

Hey all, I'm using the new Pduino 0.4beta2 and Firmata0.4beta3 with Pd-Extended 0.39 and 0.40 and an Arduino NG (Atmega16 IC) to control 10 separate LEDs via the Digital Write pins 2-12. Each has the possibility to blink at a different speed. What I've discovered is that if I have more than 6 or 7 LEDs blinking at different speeds, there is cross-talk between the channels causing the LEDs to blink at wrong intervals (but not in unison), including the onboard one on the Arduino board on Pin 13 which I'm not even sending messages to! I don't believe it is an electrical problem, as the wiring is quite simple and I decoupled the outputs to the LEDs after the problem first occurred. In fact, the problem persists even when I remove any and all of my own electronics from the circuit! The blink interval is something in the area of 200-500 miliseconds, certainly slow enough for the comport. Could it be trouble with some of the objects in the [arduino] abstraction? Any and all suggestions appreciated, as this project needs to go out the door tomorrow morning! best, Derek -- derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista ---Oblique Strategy # 95: "Is something missing?"

5 13

Testing for empty creation args?
by Bill Gribble 24 Nov '08

24 Nov '08

I am doing something like this: |loadbang| | |symbol $1| | |readfile $1 cr, rewind( | |textfile| There's also an interface to set the filename later. Because of the later message processing, it would be nice not to send the read message if there is no creation arg. Is there a straightforward way to do that? Thanks, Bill Gribble

6 7

and it's PR/Marketing, or those
by Adrian 23 Nov '08

23 Nov '08

I'm sorry for this more like OT, it's just my thought about improving PD and it's externals in another way. I'm struggling ... PD is one of the best tools for making people learn/experiment/perform/interact digital/electronic art at it's best. But where are the people that are PD's target. I'm trying to suggest that PD should try to follow a Popper-alike way of developing. Make it easy accessable for the people and use their input. Except if PD and it's externals are purely egoistic developments, which i don't think is the case ;) The more people you can involve the more feedback/developer/help you get in improving. I'm sorry for saying such things, as it is something that is an actual idea of most of the people here, i'm not trying to sell you for stupid. Maybe i'm just frustrated about my own lack of skill. I was fascinated about projects like pdp, gridflow and especially desiredata. But installing them is a hell for me as a OS X user, and the least i wanna do is search/install for all the necessary things. Now just some suggestions (excuse me for being rude): - Vastly improvement of the webcommunity, very important: Except for a very good maillinglist there is no real source for a community for pd on the net. The forum at hurleur.com is a joke, and that the official site is deadland is just sad. Furthermore the site needs to be ordered and probably hardly overworked, there is nothing wrong in making it accesible to as many people as possible by runnig it in plone, but is it nessecary? The people accesing the site now will probably not need that the site is universible compatible with every last browser on this earth and history, etc. - Improvement in usability of PD & e(xternals): Projects like the installers of iOhannes and desiredata are genial! All externals should follow a path where they can make themself accesible to the public with ease. It must be very frustrating to put lot's of effort and time into something and then nobody wants it. - And last, the documentation: Order, Unifying, Improve Please don't kill me for this mail. Lately i had a message in a Fortune-Cookie saying that "i have a reputation for being very straight forward and honest", i agree and want to follow that path. This mail is not meant to flame or criticize, especially not the developers. I bow down in front of the huge effort all of you put into PD & e. I just think the way of opening and easy accessing the public is the best way in proving that PD is the best and drive it's development. yours, adrian -- another incomplete website: http://conficere.ch/pds

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Beatrepeat (preview)
by Frank Barknecht 19 Nov '08

19 Nov '08

Hi, attached is a preview of a little effect I was working on after meeting with a nice Ableton Live user (Hi, Cee!). It aims to be a clone of the Beatrepeat effect in newer Live versions, which basically is a delay line with variable, tempo synced taps. My version is pure Pd. This is a very early prototype but already fun to play with. So have fun. Ciao -- Frank Barknecht _ ______footils.org__

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line~ for syncing to video
by Hans-Christoph Steiner 14 Nov '08

14 Nov '08

I am trying to make a version of [line~] that gives me a line based on the frame numbers I give it. Basically, I give it a frame counter in the first inlet, then start frame and stop frame as arguments. The hard part is that I want it to behave like [line] in that the last value stays in effect until something else overrides it. How do I do that with DSP data? If I use [switch~], then the [outlet~] will just retain its last value. .hc ------------------------------------------------------------------------ ---- 'You people have such restrictive dress for women,’ she said, hobbling away in three inch heels and panty hose to finish out another pink-collar temp pool day. - “Hijab Scene #2", by Mohja Kahf

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Script in osx
by Gal Chris 13 Nov '08

13 Nov '08

Hello somebody nows how tomake a script in OSX to load a PD patch selecting a specific sound decive ( MOTU sound card) and 8 channells?.... When I start PD manually it select by default the Imac soundcard so I have to select the device (MOTU) in media>portaudio manually .... I need to make a script with a especific configuration because is for a sound installation any advance is welcome, sorry for bad english regards chrs!

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[Gnome/Ubuntu] Gem video on external screen
by Martin . 08 Nov '08

08 Nov '08

Hi all, Im a bit desperate to find a way to play video on an external screen without Gem (or even X/Gnome) crashing. Ive set up xorg.conf to a virtual screensize of the double horizontally so as to have a projector read the video from the "right part" of the screen, and still have my GUIs visible on the "left part" (what is visible on my laptop screen). This is how it looks in xorg.conf: Section "Screen" Identifier "Default Screen" Device "Intel Corporation Mobile GM965/GL960 Integrated Graphi$ Monitor "Generic Monitor" DefaultDepth 24 SubSection "Display" Depth 24 Virtual 2048 768 EndSubSection EndSection The CPU jumps to 60% when playing video with the external screen on, but lays nicely on 8-9% when only playing on the normal screen. I guess lots of people are working with similar stuff - are there other (more stable/safe/efficient) ways of getting to this? or is the high CPU something to expect when using an external screen? Are there any good ways of finding the source of Gem crashes btw? Im very happy for any feedback as Im quite fresh on both Gem and projections :) cheers, Martin

6 8

[list-order] for list-abs
by Jack 06 Nov '08

06 Nov '08

Hello list, Hello Frank, I have cleaned the [list-order] abstraction to render it more simple/ elegant. Then if you want to modify it and/or add it in your list-abs, no problem. ++ Jack

2 2

basic stats on a table?
by B. Bogart 05 Nov '08

05 Nov '08

Hey all, What is the best (least cpu usage) way to get some basic stats on the content of a table? I'm using a table to store arbitrary data, and would like to get things like min/max so I can adjust the table bounds for the data it contains. Any recommendations? I currently have 100 data points, but hoping for 1000+. untiling through the whole thing and doing the calc manually seems like it would be resource inefficient. Thanks, B.

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pd <--> maxmsp compatibility
by volker böhm 05 Nov '08

05 Nov '08

hello pd-lers, i'm a long time max user and an occasional pd-lurker. for a programming course that is based on maxmsp, i'd like to make it possible for some students to follow the course using pure data. i've done this last year for the first time and it worked - lets say - ok. but there was quite some confusion, partly due to my limited experience in pd and partly because different versions of pd supported a different set of objects. i want to improve the situation a little this year and therefore have a view basic questions: i guess that the most recent pd-extended version from http:// puredata.info/downloads is what i should tell them to use in order to get the most similar setup between max and pd, right? are there any special "max<-->pd libraries" i should look out for? very often i find myself sitting infront of a pretty trivial patching problem, but i just can't find the right objects names in pd. what could i try to find objects that perform a similar/same task as their max cousins, but obviously have a different name (e.g. split <-- > moses)? is there some documentation about that? and another one: i was looking for an "uzi" object in pd. after a lot of trial and error i found "kalashnikov". ok, fine. after looking at kalashnikov help, i found that there *is* a "uzi" for pd - but i can't instanciate the object, if i haven't loaded kalashnikov at least once before. so: starting pd, new patcher, new object, uzi --> couln'd create but: starting pd, new patcher, new object, kalashnikov, new object, uzi -- does work. what might be causing this? (mac ppc, 10.4.11, pd extended 0.39.3) i've tried pd-extended 0.40.3 form this site http://puredata.info/ downloads when i launch this, i get a lot of errors: cyclone: can't load library zexy: can't load library creb: can't load library cxc: can't load library ... do i need to reset some preferences? i'll probably be back with more questions... thanks for your attention, volker.

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Pd-list October 2008