Linux-audio-dev March 2009

linux-audio-dev@lists.linuxaudio.org

50 participants
36 discussions

by Sebastian Moors

Hi, i would like to know if somebody has already thought about a (unified) way to save or export the settings of ladspa plugins (or vst,lv2..) I'm familiar with the idea of LASH, but i want to share plugin settings between different sessions. A typical use case: After recording songs with my drumset, the gate-plugin applied to basedrum and snare has most times (nearly) the same setting. At the moment this is a quite painful task: Ardour is able to save the settings, but you can't export these or exchange them between other applications. In addition, ardour's ladspa plugin dialog can just save the settings, changing an already saved settings is not possible. This results in a heap of saved settings and old revisions.. It would be great to export these settings, it could be implemented as a feature in applications like ardour2 ,jackrack or hydrogen. After exporting the setting to a plain text file (or xml), sharing the file with other people or between your computer would be no problem. What are your thoughts on this? What are the disadvantages? Thanks, Sebastian

14 years, 9 months

Join the Debian Multimedia Team! (to improve the state of Linux audio)

by Grammostola Rosea

Hi, Many of the people of the Linux audio community uses Debian or a Debian based distro (Ubuntu (Studio), 64Studio, Musix, Sidux, Mepis etc. etc.). Most of those distro's uses and rebuild the packages of Debian (unstable). There are a lot of audio packages build by the Debian Multimedia Team, but there are also a lot which are not in Debian yet (and so also not in Ubuntu (Studio), Sidux, 64studio etc.) So there is a need for more people who wants to contribute to the Debian Multimedia Team. Again, you don't have to be a plain Debian user to contribute or to take advantage of it. You will help to improve the state of Linux audio in general (at least the Debian based distro's and their community), which will be good for us all, but also for newbies who are not able yet to build all the packages themselves to enjoy all the nice things Linux audio has to offer. Also note that it is possible to build Debian unstable packages on other distro's then Debian itself (search for Pbuilder on the Internet for instance)! It will also be good for the Linux audio developers and their software. It would be more easy to install, use, test and enjoy the software by the Linux audio community! There are a lot of people these day who has an own (PPA) repo. This is ok, (and maybe it will be a good thing if the Linux audio developers make their packages available as much as possible in a Debian unstable repo/package, so it can be used on Debian and it is easy to rebuild it for Debian based distro's), But to bundle forces and to get safe, stable and quality packages, joining the Debian Multimedia Team will get much better quality packages and you will help far more people then having your solo private repo... *Why the Debian Multimedia Team? * 1) Because they want to improve Debian for music production! 2) Debian has an flexible, fast and easy package management 3) A lot of people use Debian (based) distro's, Debian itself, Ubuntu (Studio), 64studio, Sidux, Mepis etc. 4) You will learn to build quality packages 5) You don't have to become a Debian developer (DD), you can just become and stay a package maintainer. *What can I do?* 1) Build or improve packages for the Debian Multimedia Team. It's recommended to maintain packages you use yourself often. 2) Report bugs and wishes 3) Join the Debian multimedia team mailing list: http://lists.debian.org/debian-multimedia/ *Where can I find more info?* Wiki: http://wiki.debian.org/DebianMultimedia Packaging: http://wiki.debian.org/DebianMultimedia/DevelopPackaging Existing packages which needs help: http://wnpp.debian.net/ Debian New Maintainers' guide: http://www.debian.org/doc/maint-guide/ (!) Bugs: http://bugs.debian.org/cgi-bin/pkgreport.cgi?which=maint&data=debian-multim… It would be great if you choose one package which you uses a lot and maintain it for the Debian Multimedia Team! It would improve the quality of Linux audio and it will help the whole community! Kind regards, \r ps. If you like to join, please subscribe to the Debian Multimedia Team mailinglist and ask for more information: http://lists.debian.org/debian-multimedia/

15 years, 3 months

qjackd goes funkity

by Gene Heskett

Greetings all; 1: I installed the jack suite about a week ago, recommended by a friend and I've had it grab core0 of my quad core phenom and loop at 100% several times, however, using qjackctl to stop and restart it always fixes it. Is there a buglet still around? 2: I have kmail set to play its usual pling as incoming mail arrives, and since I installed jack, its quite distorted and just a nearly mote whisper. Is this a possible config error? It may be that 1 above is related to 2 above as it seems to occur at some point when the machine is quiet for the night, but fetchmail/procmail/kmail is still running, so it would be getting tapped at that input several hundred times by the time I get up the next morning. Comments/hints welcomed. Thanks. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) I have replaced NT with Linux. Linux -- heir of the byte that dogged me. -- Allan Willis

15 years, 3 months

Question: broadcasting OSC messages

by Pau Arumí

Hi all! I have a simple question about OSC, or more specifically, the liblo implementation: Is it possible to broadcast OSC messages to multiple receiving ends *in different processes*? That is, without needing to create N 1-1 communication channels, using N ports? The obvious thing would be to create two servers listening to the same port (using lo_server_thread_new ). But liblo doesn't allow creating two servers listening the same port. Ideas to work-around this? P

15 years, 3 months

qjackd Q

by Gene Heskett

Greetings all; I have used the kde audio prefs to place Jack at the top of the priority list, my audigy 2 stuffs next, with esd and pulse at the bottom. Everything seemed to work ok, but I noticed last night after I had watched some news on cnn with firefox-3.0.7, that qjackd was using an average of 50% of all 4 cores on my amd phenom, but no sound was being played at the time and the speakers were silent. Calling up qjackctl and doing a restart seems to have fixed it. Bug? Thanks. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Duty, n: What one expects from others. -- Oscar Wilde

15 years, 4 months

Re: [LAD] [Fwd: Re: realtime kernel for Debian]

by Grammostola Rosea

Hi, Sorry, but I've to call again... The developers seems very willing to include a realtime kernel there repo. They need some people who wants to build and maintain it. This is really a chance for linux audio, especially on Debian. *This is the moment!* So please consider to offer your help in building, maintaining and/or testing! Thanks in advance, \r Grammostola Rosea wrote: > Grammostola Rosea wrote: >> Hi, >> >> There is an promising discussion on the debian-dev mailinglist. Maybe >> some people who knows more about realtime kernels could join. Also >> users who might want to have an realtime kernel in Debian and/or want >> help testing could join the discussion. I think it would be nice if >> there is also an realtime kernel in Debian or that the default kernel >> would be improved for realtime (audio) usage. >> >> >> http://www.debian.org/MailingLists/subscribe > Here is the thread about a realtime kernel in Debian: > > > http://www.linux-archive.org/debian-development/268999-realtime-kernel-debi… > > > > Kind regards, > > \r > > > > >> >> \r >> >> ------------------------------------------------------------------------ >> >> Subject: >> Re: realtime kernel for Debian >> From: >> "Giacomo A. Catenazzi" <cate(a)debian.org> >> Date: >> Tue, 24 Mar 2009 13:26:35 +0100 >> To: >> debian-devel(a)lists.debian.org >> >> To: >> debian-devel(a)lists.debian.org >> >> >> Raphael Hertzog wrote: >>> On Tue, 24 Mar 2009, Giacomo A. Catenazzi wrote: >>>> Do you really need real time kernel? >>>> Debian is a technical driven project, but reading the previous two >>>> quotes, >>>> "real time" is used as marketing thing. >>> >>> It's good to question the use of any feature, but a real-time kernel is >>> certainly very useful in many industrial applications and Debian is >>> popular in that field. (Don't put a marketing label on anything where >>> you are not yourself sure of your expertise.) >> >> Yes, I didn't write very well my sentence: the previous quotes was more >> about "there exist rt kernels", "ubuntu has a rt kernel", but not solid >> requirements. I had to write some "seems", and I'm sorry for the two >> quoted people if it seems an attack. >> Anyway, later in the mail, I asked for precise needs, so we could see >> better what we should improve. >> >> IMHO most users want a low latency kernel, but not a slower kernel, so >> a CONFIG_HZ_1000 would be nice. But the original post was about >> multimedia production (and not reproduction), so the needs are probably >> other. >> >> My point was more: >> - Debian has not rt kernel. Why? Non DD interested or/and low demand? >> This is an important point. We must not produce a rt-kernel if >> we cannot provide testers and developers (in unstable). >> - kernel management is a weak point in distribution: no good method >> for kernel dependencies, using full capabilities, ... >> >> so IMHO we should try harder with the normal kernel, so that we >> can use the same infrastructure and testers. If we fail and we >> are able to support rt kernels, IMO it is good to provide it in Debian. >> >> The original mail was about "multimedia production" and few year ago >> kernel >> developers had a lot of interaction with music industries. >> I'm not an expert in the field, but how far are we in their need with >> standard kernels?) >> >> >>> I do use a real-time kernel on a Debian based system for one of my >>> customers (but I have to recompile the kernel anyway because I do other >>> customizations) and I have good reasons to do so because I can't suffer >>> serial overrun and I must ensure that the serial interrupt handler >>> is run in the required time and that no other (kernel) task has higher >>> priority. >> >> These *other customizations* are important to rt-kernel. So we need >> a person (or more) that know the needs and could support us. >> "realtime" alone is only a label ;-) >> >> ciao >> cate >> >> > >

15 years, 4 months

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

15 years, 4 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.

15 years, 4 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/

15 years, 4 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

15 years, 4 months

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Linux-audio-dev March 2009