Linux-audio-dev

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7513 discussions

Going to LAC - Anyone travelling from Milan on Wednesday?

by Steven Yi

Hi All, I'm going to the LAC and arriving at the Milan airport (MXP) at around 12:30pm on Wednesday before the conference. I am planning to take the bus to the city and then the train to Parma and was wondering if anyone else is planning on going from Milan to Parma around that time and would like to travel together. If so, just email me offlist and we can arrange meeting up! Cheers! steven

16 years, 5 months

Xiph.org Call for Student Projects

by Conrad Parker

Xiph.org/Annodex.net seeking Summer of Code student applications! 2009 is an important year for free codecs: Ogg Vorbis on every Android device, Ogg Theora support in development for Mozilla Firefox 3.5, and expanded Ogg hosting by the Internet Archive and Wikimedia. Xiph.org and Annodex.net, who develop free codecs (Ogg Vorbis, Theora, Dirac, Speex, CELT, FLAC) and web video support for them, have been selected as a mentoring organization for Google Summer of Code 2009. We are actively seeking student projects for Summer of Code. A list of project suggestions is at: http://wiki.xiph.org/index.php/Summer_of_Code_2009 Students should feel free to select one of these, develop a variation, or propose their own ideas! Some examples: * Develop a conference bridge or reference SIP client for CELT, the new, ultra-low delay audio codec that bridges the gap between Vorbis and Speex for applications where both high quality audio and low delay are desired. If you enjoy hacking on networks, you'll have fun with these CELT projects. * Develop components to support all Ogg codecs for OpenMAX IL, the media plugins used in Maemo, Android and LIMO mobile devices. This touches on many interesting projects, and is perfect for anyone with an interest in mobile and embedded systems who wants a broad introduction to multimedia codecs. * Write a JavaScript Library for Subtitles, Captions and other time-aligned text. The main focus of this project is around enabling video accessibility for Ogg in Firefox. The project requires a student with experience in JavaScript development, HTML and CSS, but also with some understanding of C for liboggplay and libkate, and of C++ for Firefox. * Make a Proof of Concept for HTML5 Ogg Video support in the Chromium Browser, using liboggplay (our Ogg Theora playback library, as used in Mozilla Firefox). Full support for HTML5 <video> is a lot of work, but let's get the ball rolling with a proof of concept for Theora frame decoding and rendering. * Add support for import and export of XSPF playlists to Songbird, the Mozilla-powered open music player. This project requires good XML foo, the opportunity to work with cross-platform XUL and JavaScript, and perhaps some C++. Submissions The student application period starts on Monday (March 23): http://socghop.appspot.com/document/show/program/google/gsoc2009/timeline and runs for a little under 2 weeks, until Friday April 3. Details of our application process are at: http://wiki.xiph.org/index.php/Summer_of_Code_Applications Interested students *must* get involved with the project development community, on project mailing lists and IRC, before the application deadline. When selecting projects, preference will be given to students who have submitted at least one patch to a Xiph.org or Annodex.net project before the application deadline. Students will receive a grant from Google for successful work on their GSoC projects. Hacking on free multimedia projects is fun and can have a big impact. We need students who love to hack, to help put support for free codecs into more applications, browsers and networks.

16 years, 5 months

[OT] RME HDSP Multiface (1st gen), PCMCIA cardbus (1st gen), and PCI-to-PCMCIA cardbus (for desktop) for sale

by Ivica Ico Bukvic

Barely used. If interested, please email me your offer. Originally this thing cost ~$1,200 (with the PCI-to-PCMCIA cardbus for the desktop connectivity). Been used on Linux and Windows. Ivica Ico Bukvic, D.M.A. Composition, Music Technology Director, DISIS Interactive Sound & Intermedia Studio Assistant Co-Director, CCTAD CHCI, CS, and Art (by courtesy) Virginia Tech Dept. of Music - 0240 Blacksburg, VA 24061 (540) 231-6139 (540) 231-5034 (fax) ico(a)vt.edu http://www.music.vt.edu/faculty/bukvic/

16 years, 5 months

JACK and computer sleeping

by nescivi

Hiho, It seems that JACK (just tested with v0.116) does not survive when the computer is put to sleep, and woken up again. Is there any reason why this is so? sincerely, Marije

16 years, 6 months

Vamp Plugin Tester: a simple test utility for Vamp plugin development

by Chris Cannam

Announcing v0.1 of the Vamp plugin tester, a simple program that loads and tests Vamp audio feature extraction plugins for various common failure cases. It can't check whether you're getting the right results, but it can help you write more resilient and better-behaved plugins. Source code: http://downloads.sourceforge.net/vamp/vamp-plugin-tester-0.1.tar.bz2 OS/X universal binary: http://downloads.sourceforge.net/vamp/vamp-plugin-tester-0.1-osx-universal.… Windows binary: http://downloads.sourceforge.net/vamp/vamp-plugin-tester-0.1-win32.zip For more information about Vamp plugins, please see http://vamp-plugins.org/. The "home page" for this utility is the developer page at http://vamp-plugins.org/develop.html . There is some documentation for this program in the README file, but the short version is that you run it at a command prompt with the library name and plugin name, colon-separated, as an argument: $ ./vamp-plugin-tester vamp-example-plugins:spectralcentroid ... and see what it has to say about your plugins. It may also crash; if it crashes in the middle of one of its tests, that usually means that your plugin has crashed when faced with some unexpected input (run it in a debugger, or a memory checking utility if you have one, to find out where). This tester does report some genuine bugs when run against several of the existing Vamp plugins. I'll be aiming to make some fixes where I'm able. This is only the first release, so it's quite likely that the tester hasn't been tested enough itself yet. Please report any problems to me or the Vamp plugins develoment forum at http://vamp-plugins.org/forum/index.php/board,1.0.html . Chris

16 years, 6 months

problem with alsa/portaudio

by vincent meserette

Hi all, In one of my code, I use the snd_pcm_open() function of the ALSA lib to access to my sound device, but when I run it I have the following message : ALSA lib pcm.c:2106:(snd_pcm_open_conf) Cannot open shared library /usr/lib/alsa-lib/libasound_module_pcm_pulse.so After having searching on the web, it seems it comes from a conflict between alsa and pulse audio. As indicated on some forums, I have reinstalled pulse audio and libasound2-plugins but it doesn't work, even if the aplay function works well on my system. Does anybody know from where could come the problem ? Thanks in advance Best regards Vincent PS : my distribution of linux is ubuntu 8.10

16 years, 6 months

Re: [LAD] [LAU] Join the Debian Multimedia Team! (to improve the state of Linux audio)

by Grammostola Rosea

Crypto wrote: > On Monday 09 March 2009 16:29:53 Ivica Ico Bukvic wrote: > >>> My point was : if Debian Multimedia is just an effort to make things >>> better >>> looking on the audio/multimedia side, then it has more to do with the >>> "Debian packages and process" group of people than with the linuxaudio >>> people. >>> >> I guess this part is for Debian folks to answer. Even if multimedia part >> cannot be treated as a separate entity, perhaps having Debian as a whole a >> member of Linuxaudio.org would not be a bad idea. After all, we do have >> Canonical/Ubuntu and Mandriva on board already. >> >> +1 > > I think one of the most important things to have would be a debian RT kernel > that can be installed like any other deb package already can. This would mean > to patch/finetune a standard kernel to make it RT capable everytime a new > standard kernel is released. Maybe it could be sufficient not to do that for > EVERY single kernel version that is released but stick to some "milestone" > versions instead that nevertheless reliably do the RT and of course MIDI > stuff. > > This RT kernel could then be offered as a standard debian package in any of > the existing standard debian repositories, so that anyone needing RT could > install it on their machine in parallel to their previously installed > ordinary kernel without having to change a lot on their machines. > > As for the LAU-related stuff: > It seems to me that there are some great LAU applications out there for which > there are no deb packages available (neither are Ubuntu packages). I think we > need some place where LAU programmers can announce their software (which has > been here so far) and make other folks aware of it and we also need some kind > of deb repository where programmers can release their software so we can all > apt-get it. Maybe this place could be on an official debian software site > with only one limitation: as this software tends to be updated frequently it > is kind of experimental and debian people would rather not declare this > as "rocksolid stuff" that can be mixed with the standard release of debian. > So people of debian could release LAU related software on their sites without > having to give any "warrantee" for it. > > BTW: when having a LAU related repository I look forward to seeing DSSI-VST > and fst released as true apt-get installable packages ;-) > > I think such a repository you're talking about could be indeed a good idea. But it could have some disadvantages to, like also all those custom PPA Ubuntu repo's has. The packages maintained by the Debian Multimedia Team are safe, stable and have good quality. The Debian packages do pass some quality rules, which is a very good thing imho, better then having a repository without any 'warrantee'... Also your idea could have the effect that people only upload their packages to this repo and not to Debian itself, so there will be a quality loss... But for packages which are valuable and do not pass the (license) criteria of Debian it could be good to have such a repository. For example for a realtime kernel and stuff like dssi-vst, (FST is a candidate for Debian imho), linuxsampler (?), Jost... Also, some developers make packages of there apps themselves. I think it's the best for Debian (based) distro's that they build it against Debian unstable, so the community can use it and the package maintainers can use it to build it against their distro easily. So maybe some kind of an - Debian Multimedia 'experimental' repo > for packages build against unstable, which are not in Debian yet. Devs can upload their packages to this repo and package maintainers can use it for uploading it to Debian. (I think if you setup such a thing, it should happen in corporation and communication with the Debian Multimedia Team!) - Debian Multimedia non-free repo > for dssi-vst, jost, etc. Btw. There was a guy who was aiming to have such a Debian repo with a realtime kernel: https://www.scimmia.net/code/wiki/DebianRepository Above all, the most needed are people who want to maintain packages for the Debian Multimedia Team! Regards, \R

16 years, 6 months

libzita-convolver

by Jaromír Mikeš

Hello, I am trying build debian package library of zita-convolver I need to fill some description there. There is not this kind of information in orig. tarball. Can any advise me what write there? Thank you mira

16 years, 6 months

[ot] Vim substitution question...

by Julien Claassen

Hello all! I'm sorry to bother you with that, but I don't find a feasable solution for this. It's all about patterns. Imagine the following text examples: <A HREF="url" TITLE="MY_TITLE"> <a NAME="x" id="x"> <P align="center"> What I need to do is make sure, that every TAG (a and p in these cases) and every attribute (href, title, name, id and center in these examples) is lower case. I've tried a lot, but I'm not the crack at patterns and so I got no completely satisfying result, if I got any at all. :-( Could someone please help me here? Kindest regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

16 years, 6 months

testing jack client, errors, shutdown..

by Alex Norman

I'm wondering if it is possible to force a jack client into an error condition without actually changing the client. I'm wanting to see what actually happens when my client's error + shutdown handlers are called. It seems as though my 'shutdown handler' isn't being called when jack shuts down. Thanks, -Alex

16 years, 6 months

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Linux-audio-dev