Linux-audio-dev

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7516 discussions

Re: [linux-audio-dev] Re: [Jackit-devel] [ANN] das_watchdog 0.0.1 and jack_capture v0.2.3

by Kjetil S. Matheussen

stefan kersten: > On Mon, Feb 13, 2006 at 01:22:21PM +0100, Florian Schmidt wrote: > > > echo '/usr/local/sbin/das_watchdog & >/dev/null' >>/etc/rc.local > > > > This assumes an initscript style that's not used on all linux systems. > > i've attached a simple /etc/init.d script; on debian you can > do: > > # cp das_watchdog /etc/init.d/ > # update-rc.d das_watchdog defaults > # invoke-rc.d das_watchdog start Thanks! Hope you don't mind that I included your script. A new version (0.2.0) is up.

19 years, 8 months

[linux-audio-dev] Re: lad design patterns

by Juhana Sadeharju

>From: "Levi D. Burton" <ldb(a)puresimplicity.net> > >does the idea of documenting various lad design patterns make >sense to anyone? Such "LAD Gems" doc would be much needed here too. (For audio dsp gems, take a look at "musicdsp.org".) I would appreciate if somebody would take a look at Ardour and document best gems found there. E.g., the GUI and audio thread separation and start up sequences. Likewise for Linuxsampler and one of its GUI frontends. Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software

19 years, 8 months

[linux-audio-dev] [ANN] das_watchdog 0.0.1 and jack_capture v0.2.3

by Kjetil S. Matheussen

Download from http://ccrma.stanford.edu/~kjetil/src/ Das_Watchdog ============ ABOUT ----- Das_Watchdog is a program heavily and shamefully inspired by the rt_watchdog program made by Florian Schmidt: http://tapas.affenbande.org/?page_id=38 However, this one has some improvements: 1. It works with 2.4 kernels as well as 2.6. (well, at least I think it works with 2.6...) 2. Instead of permanently setting all realtime processes to run non-realtime, das_watchdog only sets them temporary. 3. When the watchdog kicks in, an X window should pop up that tells you whats happening. (just close it after reading the message). INSTALLING ---------- make cp das_watchdog /usr/local/sbin/ echo '/usr/local/sbin/das_watchdog & >/dev/null' >>/etc/rc.local reboot REQUIREMENTS ------------ tcl/tk. (http://en.wikipedia.org/wiki/Tk_(computing)) Jack_capture ============ ABOUT ----- jack_capture is a small simple program to capture whatever sound is going out to your speakers into a file. This is the program I always wanted to have for jack, but no one made. So here it is. CHANGES ------- 0.2.2 -> 0.2.3: *Added -z argument that choose number of leading zeros. *Various changes.

19 years, 8 months

[linux-audio-dev] C++ Realtime Threads

by Carlo Capocasa

Hi, I'd like to make my application threaded and one of them realtime. Can someone point me to a tried-and-tested way to do this? Carlo

19 years, 8 months

[linux-audio-dev] SF_VIRTUAL_IO and something like curl?

by Mario Lang

Hi. Now that libsndfile has virtual IO, did anyone perhaps already write a little libcurl wrapper? The fopen.c example of libcurl is a good base for such a thing. -- CYa, Mario

19 years, 8 months

[linux-audio-dev] Job opportunity, CCRMA, Stanford University

by Fernando Lopez-Lezcano

Hey, I thought this might be of interest....... For some reason the blurb is, right now, incomplete in the url below (will be fixed asap), so I'm including the whole thing here. -- Fernando The Center for Computer Research in Music and Acoustics would like to announce a job opening for Systems Administrator/Audio Maintenance Engineer (#009817). Below is the job description. You can apply to this position by visiting the Stanford Jobs Website at: http://jobs.stanford.edu/openings/display.cgi?Job_Req=009817&JFam=NIL&JOBCO… The Center for Computer Research in Music and Acoustics is a multi-disciplinary facility where composers and researchers work together using computer-based technology both as an artistic medium and as a research tool. The System Admin/Audio Maintenance Engineer’s primary purpose is to assist CCRMA’s technical staff in providing state-of-the-art systems for music production and research in an open-source environment. Assist in managing 40-50 Linux desktops, 10-15 Mac OS machines and the center’s server and network systems. Assist in overseeing audio maintenance in our studios and performance space including commercial DAW systems. Assist with concert sound. Identify needed facility upgrades and assist in planning, implementing and installing, of IP phone system, security system, and network audio , network backbone, servers and system services. Responsible for creating accounts and other day-to-day tasks needed for student, staff faculty and visitor computer accounts. Responsible for researching and procuring technical needs for the Center. Demonstrated technical experience with Linux (preferably rpm-based distributions) and Mac OSX desktops, networks and servers. Interest in maintaining rpm packages such as those included in Planet CCRMA and creating and maintaining a repository of open-source packages, both for Linux and eventually Mac platforms. Demonstrated reliability to work under supervision and within project management goals. experience with highly-technical system administration, ability to solve problems independently. Requires initiative and strong organizational skills, efficient response to e-mail requests and balance general incoming requests while handling multiple projects despite frequent interruptions. Excellent communication skills and ability to provide use-able documentation for end-users. Familiarity with use and function of analog and digital audio equipment. Knowledge of video systems would be a plus. Ability to troubleshoot audio system setups (not board-level electronics) and maintain and install computer-associated audio equipment. Demonstrated ability to build hardware (including soldering skills) or the willingness to learn. Ability to make and repair audio, video, and computer cables. Resumes accepted until March 1, 2006.

19 years, 8 months

[linux-audio-dev] [Ann] Shelljam 0.0.2 MIDI keyboard

by Carlo Capocasa

Hi, Announcing Shelljam version 0.0.2. Shelljam is a way of playing electronic music live using standard computer hardware. It is implemented in C++ using fast portable libraries. It is designed to be suitable for live performance and studio work. http://shelljam.sourceforge.net Thanks! Carlo

19 years, 8 months

[linux-audio-dev] [ANN] das_watchdog 0.1.0

by Kjetil S. Matheussen

Download from http://ccrma.stanford.edu/~kjetil/src/ INSTALLING ---------- make cp das_watchdog /usr/local/sbin/ echo '/usr/local/sbin/das_watchdog >/dev/null &' >>/etc/rc.sysinit reboot USAGE ----- Whenever a program locks up the machine, the watchdog temporarily sets all realtime process to non-realtime for 8 seconds. You will get an xmessage window up on the screen whenever that happens. To test it, run the attached program "test_rt" (as root on 2.4), which immediatley freezes your machine. However, a window should pop up after about 5-6 seconds telling you that the watchdog set the process to non-realtime. CHANGES ------- 0.0.1->0.1.0 * Properly set the DISPLAY and XAUTHORITY environment variables in various ways to make sure the message is really shown. (It really works now!) * Use xmessage instead of wish. (much nicer) ACKNOWLEDGEMENT --------------- The program is mentally based on Florian Schmidts program rt_watcdog. Florian Schmidt also wrote the included test_rt program.

19 years, 8 months

[linux-audio-dev] portmidi app i/o ports

by Carlo Capocasa

Hi, I would like to know whether it is possible for portmidi based applications to have their own sequencer i/o ports to connect to. Thanks, Carlo

19 years, 8 months

[linux-audio-dev] ANNOUNCE: Rosegarden-4 1.2.3 released

by Chris Cannam

The Rosegarden team are delighted to announce the release of version 1.2.3 of Rosegarden 4, an audio and MIDI sequencer and musical notation editor for Linux. Rosegarden is among the largest and most insanely ambitious Linux music software projects, and is the only Linux application to offer full composition and recording capabilities to musicians who prefer to use classical notation. http://www.rosegardenmusic.com/ The long-awaited 1.2.3 release of Rosegarden-4 offers a variety of new features, bug fixes and enhancements. These include: * The main segment canvas has been rewritten and is now faster, more responsive, more accurate, and marginally prettier than before. (This work proved much more complex than hoped, and accounts for much of the time spent since the 1.0 release a year ago.) * A new percussion matrix editor has been added. MIDI devices can have user-configurable percussion key maps, stored in the same device files as bank and program definitions. Users are invited to contribute their own. * Multi-track audio recording and simultaneous recording of audio and MIDI are now supported. * A "project packager" has been introduced and integrated, facilitating the exchange of complete Rosegarden projects including associated audio data and any other required files. * The Lilypond export function has been updated for Lilypond 2.6 and features a new Preview mode. * You can now control Rosegarden's mixer and other twiddly bits using an external MIDI controller device such as the Behringer BCF2000. * Rosegarden is now capable of synchronising to MIDI Time Code in master and slave modes (thanks to Vince Negri). MMC master and slave are also now supported. * Rosegarden's ALSA MIDI ports can now be connected and controlled using an external ALSA connection manager such as qjackctl (thanks to Pedro Lopez-Cabanillas). * The default sequencer timer selection should be better behaved than in 1.0 (eliminating the dreaded "Rosegarden only plays the first note" problem). * Effects plugins can now be applied to groups of audio instruments at the buss stage. * Many new icons and improved versions of old icons have been added (thanks to Vladimir Savic). * The build system now uses scons instead of autotools. This release also sees hundreds of bug fixes, including fixes to some long-standing issues with DSSI plugin support, JACK transport synchronisation, and punch-in recording. For more information about Rosegarden and what it can do for you, please see http://www.rosegardenmusic.com/ Rosegarden is Free Software under the GNU General Public License.

19 years, 8 months

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Linux-audio-dev