Pd-list March 2011

pd-list@lists.iem.at

139 participants
209 discussions

Re: [PD] Patch for Akai EWI (was "Reading and writing binary files")
by David 10 Mar '11

10 Mar '11

Thanks. I'm not sure I understand what you mean when you say "you don't really need sysex", though. I have to send a 6 byte NRPN message, followed by a 14 byte SysEx message. I think I understand how to send the NRPN message, but I'm still confused about the SysEx message. Would I use [midiout] to do that? According to the help file in PD, this object is still undocumented and is only supported on Linux. Is that still true? And it only has two inlets, which I'm guessing would be an arbitrary 1 byte value and a channel number, but I'm not sure. Unfortunately, none of these messages are documented in the owner's manual or on their web site, but someone has reverse-engineered the messages and posted his findings here: http://www.ewiusb.com/sysex_page1 http://www.ewiusb.com/sysex_page2 The whole stream (an NRPN, a 14 byte SysEx, the same NRPN again, another 19 byte SysEx, and a final NRPN) would look like this, for example: // sysex enable : 63 01 62 04 06 20 // sysex message : F0 47 7F 6D 00 00 06 40 40 40 40 08 7F F7 // sysex enable : 63 01 62 04 06 20 // sysex message : F0 F7 7F 6D 02 00 0B 00 00 40 20 02 00 00 7F 00 7C 7D F7 // sysex done : 63 01 62 04 06 10 David. > Message: 1 > Date: Sun, 6 Mar 2011 18:07:59 +0100 > From: Andr?s Mur?nyi <muranyia(a)gmail.com> > Subject: Re: [PD] Patch for Akai EWI (was "Reading and writing binary > files") > To: PD List <pd-list(a)iem.at> > Message-ID: > <AANLkTimf2TztoeqGx38BLvs_Rphk5YQLi6NnFnB2Uu0j(a)mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > NRPNS are interestingly made up of CC messages so you don't really need > sysex. > Attached [nrpnout] (original version by David McCallum) and [nrpnout-yamaha] > where CC numbers are modified according to Yamaha specs. You may need to > match two of the four CC numbers with your gear (the other two are always > the same), and check if your gear needs MSB and LSB address or just one > "NRPN number". > > Andras

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How do I squeeze more performance out of Gem?
by John Harrison 10 Mar '11

10 Mar '11

I'm working with a high-powered machine but I'm running into a bottleneck with Gem. I'm running at 20fps and at times was intending to have as many as 200+ lines and spheres on a 1024x768 screen. At around 60 lines/spheres I'm already at 50% CPU. I know the problem is Gem because if I stop rendering, CPU immediately drops to less than 4%. There's some other manipulations I use periodically too causing another 40%+ of CPU so I'm a far cry from my 200+ intention while saturating my computational limits. If I turn lighting off, BTW, I already gain 10% CPU back (not an option I want to explore.) I'm not sure what to do and was even considering breaking the rendering into independent screens (this machine has 8 cores), then using pix_share to recombine them in a "master" instance. I'd have to use pix_snap to capture each of the Gem windows in each of the processes, and each one draws about 40% CPU when capturing a 1024x768 buffer at 20 fps so besides creating a headache for myself this is going to be a lot of CPU overhead. I also don't know how the graphics card is fitting into all of this, if it would become a bottleneck at some point, how to tell, etc. What's the "top" command for a graphics card? :-) These lines and spheres are nothing special, btw. No texturing, just translates, colors, and alpha. the lines are made with curves of 2 points each. Is there some trick or some area of programming or using the graphics card I need to be considering? Any thoughts/advice would be appreciated. It's strange --- I don't think I'm seeing performance on this machine much better than on my not-so-special laptop. This machine has Nvidia GeForce GTX 460, Ubuntu 10.10 32 bit, Pd-extended 0.42-5 binary from the Pure Data site, Intel i7 3Ghz. I'm using Nvidia proprietary driver 290.19.06. When I say stuff like "40% CPU" I mean for a single core. So in theory this machine has 800% CPU limit in my nomenclature. But since an instance of Pd/Gem runs on only a single core, I have a limit of 100% for any single Pd/Gem instance (as most of you already know I'm sure.) -John P.S. I'm loving working with Gem and pmpd these days. Awesome stuff, guys! :-)

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Toughts on PD vs. Max stability on macintels on analogindustries.com
by pierlu 10 Mar '11

10 Mar '11

Hi everybody. I regularly read the blog @ analogindustries.com, and today an interesting post about pd vs max/msp stability on macintel appeared. You can read about it here http://www.analogindustries.com/blog/entry.php?blogid=1299508451902 To be honest, I always found pd on PPC macs to be fairly stable for my needs, and the author of the post (in comments) points out that on pc's pd is fairly stable too. So I just wanted to bring out the matter to the community, just for the sake of discussion. No hatred please! :) cheers, p.

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Re: [PD] Download Pd?
by Marco Donnarumma 09 Mar '11

09 Mar '11

Hi Andras, I agree with you, however it seems we both can't deal now with a global "pimping" of the portal. So, I would say, let's start working on the download section; this way we can get familiar with Plone and a further major enhancement would be easier in the future. Unless someone here wants to take over the whole thing. Besides, shall we move on the PdWeb list as IOhannes suggested? I just subscribed. M > > IMHO, the way to do these things is concept/functions/hierarchy -> > graphical > design -> implementation (HTML, CSS, CMS hacking). Concept making has > already been started as far as i can see, but it's still kind of long way > to > actually changing anything general on the website. When we have new > templates worked out, it won't be so hard to switch them with the current > ones. > Of course, small changes can be done anytime, i just think that a bigger > revamp shall not be started by jumping in the middle of the haystack. > A voluntary leader for the "pimp up" would be nice... > > Andras > > -- Marco Donnarumma Independent New Media and Sonic Arts Professional, Performer, Instructor ACE, Sound Design MSc by Research (ongoing) The University of Edinburgh, UK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Portfolio: http://marcodonnarumma.com Lab: http://www.thesaddj.com | http://cntrl.sourceforge.net | http://www.flxer.net Event: http://www.liveperformersmeeting.net

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building on OSX
by ronald kuivila 09 Mar '11

09 Mar '11

Hi all, I am new to Pd. I downloaded the basic MSP release and tried to compile under OSX, but I get a complaint from lipo. The problem seems to be I have the 10.5 SDK, so altering the -i flag to /Developer/SDKs/MacOSX10.5.sdk solved the problem: cc -g -O2 -DPD -Wall -W -Wstrict-prototypes -Wno-unused -Wno- parentheses -Wno-switch -DDL_OPEN -DMACOSX -DUNISTD -I/usr/X11R6/include -I../portaudio/include -I../portaudio/ src/common -I../portaudio/src/os/mac_osx/ -I../ portmidi/pm_common -I../portmidi/pm_mac -I../portmidi/ porttime -DUSEAPI_PORTAUDIO -DPA19 -DPA_USE_COREAUDIO - DNEWBUFFER -isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch i386 -arch ppc -Wno-error -O2 -o ../bin/pd-watchdog s_watchdog.c Is there some way to automate this choice in the makefile? Cheers, RJK

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Re: [PD] Download Pd?
by Marco Donnarumma 09 Mar '11

09 Mar '11

That's a good improvement, thanks IOhannes. M > > > I would like "Downloads" to point to a page where you only see three > > > options (with clear explanation on what each item is about): > > > 1. puredata > > > 2. pd-extended > > > 3. other (http://puredata.info/community/projects/software) > > > > better now? > > > > fgmasdr > > IOhannes > -- Marco Donnarumma Independent New Media and Sonic Arts Professional, Performer, Instructor ACE, Sound Design MSc by Research (ongoing) The University of Edinburgh, UK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Portfolio: http://marcodonnarumma.com Lab: http://www.thesaddj.com | http://cntrl.sourceforge.net | http://www.flxer.net Event: http://www.liveperformersmeeting.net

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TouchOSC and Pure Data on OS X
by Wilfred de Zoete 09 Mar '11

09 Mar '11

I have recently purchased TouchOSC on the iPhone and have succesfully controlled Ableton Live with LiveControl and iTunes and other programs with OSCulator (AppleScript). When I try the PD-examples from http://hexler.net/software/touchosc I have no succes. When I want to open the .pd file with the most recent version of PD extended (0.42.5) I get the old watch and nothing happpens. This is also the case with older PD's I use. I got the 'basic.pd' up and running before I installed one of the other programs (LiveControl or OSCulator or TouchOSC Editor) but cannot remember which one. I know that the .pd files have a prefilled [OSCreceive] (don't remember the correct syntax) with port 8000. OSCulator has a default port of 8000 as well. So I tried a cold boot and did not start up any other program than PD. Even this did not help. Could this be the problem? Are there more people working with TouchOSC and PD? Can someone help me trying to make a new OSCreceive from scratch with the correct syntax? System specs: iOS4.2.1 on iPhone 3G - OS X 10.6.6 on late 2008 15" MBP. All software is up to date. Thanks in advance! Greets, Wilfred

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Re: [PD] Read/write of raw binary data
by David 09 Mar '11

09 Mar '11

Hi! I developed some abstractions for reading/writing binary files, but they're somewhat limited in capability. They just load the data into a list of floats (one per byte), or save a list of floats to a file, and they read/write the entire file at once. They don't support repositioning within the file, or writing/reading a portion of the file. But if the files are relatively small, they might be suitable. I can send them to you later if you're interested, I'm at work right now. David. > Date: Tue, 8 Mar 2011 17:15:19 +0000 > From: Jamie Bullock <jamie(a)postlude.co.uk> > Subject: [PD] Read/write of raw binary data > To: pd-list <pd-list(a)iem.at> > Message-ID: <CD7D3F69-AA06-4499-8472-F2C089406270(a)postlude.co.uk> > Content-Type: text/plain; charset=us-ascii > > > Hi all, > > Does there exist an external for reading and writing raw binary data from file? > > I tried with with [msgfile], which kind of works, but it doesn't give me an identical file if I read/write e.g. a JPEG. > > Context: I have a student who works on 'glitching' images and video by editing the files in a text editor and the saving. He'd like to experiment with doing this dynamically in Pd. > > > Jamie >

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Read/write of raw binary data
by Jamie Bullock 08 Mar '11

08 Mar '11

Hi all, Does there exist an external for reading and writing raw binary data from file? I tried with with [msgfile], which kind of works, but it doesn't give me an identical file if I read/write e.g. a JPEG. Context: I have a student who works on 'glitching' images and video by editing the files in a text editor and the saving. He'd like to experiment with doing this dynamically in Pd. Jamie

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Re: [PD] Toughts on PD vs. Max stability on macintels on analogindustries.com
by Marco Donnarumma 08 Mar '11

08 Mar '11

Besides the unspecified bugs and crashes, I think what's overstated in that blog post is the brave comparison and generalization between OS and proprietary software. Imho it's fairly non-sense, even more 'cause not backed up by specifications or even simple ideas. I agree one can freely complain on his own blog, but, hey, fact is you're still using a free software and the license is quite clear about it. No warranty, if it doesn't work as you expect go on for Max. Without bothering yourself and the others. If you really need to do it, you can in a far more polite and constructive way. As we all know there's a massive amount of professionals working with Pd on Mac flawlessly. (I would be curious to know how many new blog visits he has in these days) M > > when i was giving a short Pd workshop in november there was a parallel > session in maxMSP/jitter and one of those students came up to me and was > complaining that MAX always crashed.... > Pd didn't. > just to throw in a equally unspecific report. > > -- Marco Donnarumma Independent New Media and Sonic Arts Professional, Performer, Instructor ACE, Sound Design MSc by Research (ongoing) The University of Edinburgh, UK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Portfolio: http://marcodonnarumma.com Lab: http://www.thesaddj.com | http://cntrl.sourceforge.net | http://www.flxer.net Event: http://www.liveperformersmeeting.net

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Pd-list March 2011