Linux-audio-dev May 2007

linux-audio-dev@lists.linuxaudio.org

68 participants
53 discussions

Small USB audio devices (ALSA compatible)?

by David Topper

Curious if anyone has had luck with some small usb audio devices and ALSA? Kernel 2.4? Thanks, DT -- Technical Director - Virginia Center for Computer Music http://www.virginia.edu/music/VCCM/

17 years, 10 months

Re: [LAD] PHASEX-0.10.3

by Nedko Arnaudov

William Weston <sysex.net(a)sysex.net> writes: > Ahhh... I misunderstood and thought you were having troubles only > when JACK was requesting a shutdown (which is only partly solved by > the above patch). Thanks for being clear on this. The segfault on > shutdown was caused by a race condition on thread cancellations and > threads exiting normally. Version 0.10.3 contains the fix for this > (which also improves shutdown time) as well as fixes for slowness > when … [View More]

17 years, 10 months

PHASEX-0.10.2

by William Weston

The [P]hase [H]armonic [A]dvanced [S]ynthesis [EX]periment, version 0.10.2 is ready for download (source tarball and FC6 RPMs) at: http://sysex.net/phasex/ This release contains many fixes, most notably better support for older GTK versions. PHASEX now works with GTK2 versions as low as 2.4.x, which should help most of the build issues on older distros. Here's everything from the Changelog for this release: * Fixed typos and omissions in parameter help file. * Improved error handling … [View More]

17 years, 10 months

RE: ANN: RTMix 0.76 (a.k.a. "rtmix lives on")

by Ivica Ico Bukvic

Just realized that there was already a 0.76 release back in 2003... DOH! Let's then call this one 0.76b ;-) Ico

17 years, 10 months

ANN: RTMix 0.76 (a.k.a. "rtmix lives on")

by Ivica Ico Bukvic

Well, it's been over 2 (3?) years since last release, but rtmix refuses to die ;-). Thanks solely to Robin Gareus and his heroic work in making rtmix gcc4 compliant, I am releasing rtmix version 0.76. Apart from compile error fixes (courtesy of Robin), there have been a few cosmetic tweaks, but most notably, the source is now released under a 100% GPL-compliant license. That being said, the code is still a dirty hack, the internal event cue occasionally still misbehaves (albeit only in very … [View More]complex situations), and unfortunately native alsa seq is still MIA (uses old unix dev access). OTOH, the thing does work as advertised, has been used, and continues to be used in my works without a hitch. Apart from oss midi, rtmix supports networking, OSC, and other goodness making it rather practical for on-screen coordination as well as interaction between performer(s) and computer. For more info on what really rtmix is please consult the HTML documentation included with the tarball (or see online documentation info below). The tarball (5MB) comes with source, documentation (some statements in it are likely a bit outdated, so please take those parts with a grain of salt), tutorials, and precompiled binary on Ubuntu 6.10 (i686, qt3, gcc), so if you have these a simple "make install" should do it (installs in /usr/local/rtmix and binary in /usr/local/bin). For a "simon" tutorial with sounds you will also need sounds zipfile (11MB-ish) which are downloadable from the same folder (just browse the folder). To download latest RTMix click here: http://ico.bukvic.net/Linux/RTMix/rtmix-latest.tar.gz Online documentation: http://ico.bukvic.net/Linux/RTMix/RTMix-docs/ Complaints to: /dev/null Future roadmap: Rtmix in its current state is a project in a need of a total rewrite. This is primarily due to the fact that despite the fact rtmix appears to do the job in 99.9% of instances, the code is an ugly hack which makes its maintenance and perhaps more importantly expandability exponentially difficult. That being said, I am looking forward to one of the upcoming summers when I will dig into the code once again and rebuild the darn thing from the ground up the way it was meant to be all along. Until then, this version should prove an adequate substitute. Enjoy! Ivica Ico Bukvic, D.M.A. Composition, Music Technology, CCTAD, CHCI Virginia Tech Dept. of Music - 0240 Blacksburg, VA 24061 (540) 231-1137 (540) 231-5034 (fax) ico(a)vt.edu http://www.music.vt.edu/people/faculty/bukvic/ http://ico.bukvic.net [View Less]

17 years, 10 months

Re: [LAD] PHASEX-0.10.2

by Nedko Arnaudov

William Weston <sysex.net(a)sysex.net> writes: >> The patch does not help. I beleive the AFAIK the jack_shutdown_handler() >> is called only when jackd is being shut down, not during jack client >> shutdown. I added printf in the function and it does not show during >> phasex shutdown. It appeared however when I tried to stop jackd while >> phasex was running (and there were some other strange messagest too): >> >> # phasex >> JACK tmpdir … [View More]identified as [/tmp] >> cannot read server event (Success) >> cannot complete execution of the processing graph (Resource temporarily unavailable) >> zombified - calling shutdown handler >> jack_shutdown_handler() called. > > Finally figured what's going on here. It turns out that the engine > thread will shut down cleanly, even if currently blocked on the > pthread_cond_wait() after the jack thread goes away. The segfault > is being caused by the jack_shutdown_handler() being called from a > thread other than the jack thread, thus calling jack_deactivate() > and jack_client_close() from the wrong thread. Try this one: > > --- phasex-0.10.2/src/jack.c 2007-05-22 15:38:29.000000000 -0700 > +++ phasex/src/jack.c 2007-05-22 15:38:50.000000000 -0700 > @@ -231,11 +231,6 @@ > *****************************************************************************/ > void > jack_shutdown_handler(void *arg) { > - if (client != NULL) { > - jack_deactivate(client); > - jack_client_close(client); > - client = NULL; > - } > phasex_shutdown("JACK shut down client.\n"); > } > > > The phasex_shutdown() function already handles a clean shutdown of > phasex's jack thread (and the jack_deactivate() and > jack_client_close() calls are already made in the normal thread > cleanup handler), so this appears to be the best way to handle it. > > Let me know if it still gives you any troubles. [start jackd] [start phasex] JACK tmpdir identified as [/tmp] [stop phasex] Thank you for using PHASEX! (C) 1999-2007 William Weston <weston(a)sysex.net> Released under the GNU Public License, Ver. 2 Segmentation fault [start phasex] JACK tmpdir identified as [/tmp] [stop jackd] cannot read server event (Success) cannot complete execution of the processing graph (Resource temporarily unavailable) zombified - calling shutdown handler jack_shutdown_handler() called. JACK shut down client. Thank you for using PHASEX! (C) 1999-2007 William Weston <weston(a)sysex.net> Released under the GNU Public License, Ver. 2 Segmentation fault As I already noted jack_shutdown_handler() is not called on phasex stop at all. -- Nedko Arnaudov <GnuPG KeyID: DE1716B0> [View Less]

17 years, 10 months

[LAU] LS 0.4.0 trouble creating more than 2 audio-drivers

by Julien Claassen

Hi everyone! I still have the problem: If I try to create more than 2 jack-devices, LinuxSampler just quits. did anyone else ever experience that problem? Is that problem known to the LS-crowd? Is it possibly just a restriction, for I get no error or is it a real bug? I'd be happy about some answers, for it'd be really a great help in recording and processing my tracks. If there's anything I can do to assist in isolating the problem, just tell me what to do! Kindest regards … [View More]

17 years, 10 months

[ANN] Alsaplayer 0.99.79 and fftscope 1.0.4 released

by Dominique Michel

Alsaplayer 0.99.79 ------------------ AlsaPlayer is a new type of PCM player. It is heavily multi-threaded and tries to excercise the ALSA library and driver quite a bit. It has some very interesting features unique to Linux/Unix players. This is a feature enhancement and minor bugfix release. New features: Basic keyboard navigation and loop inside a selection have been added. Bugfix: A missing include was added; this make at Alsaplayer will compile on never gcc and non gcc … [View More]

17 years, 10 months

important acknowledgments

by Ivica Ico Bukvic

As we continue to brave incredible load on our server please allow me to use this opportunity to extend gratitude to those who have generously offered their time and talents to keep server in working condition (especially given our limited bandwidth). So please give a round of applause to Robin Gareus our interim admin, Burkhard Ritter, our Linuxaudio.org webmaster, and Marc-Olivier Barre our listserv admin. Without their collective genius our server would be now a melted pile of goop! To … [View More]

17 years, 10 months

Programming OPL3 fm synth

by Jozef Henzl

Hello list, I'm trying to directly access an opl3 fm synth on my old sound card, but i'm unable to find any docs or source code. Is there anybody who has an experience with this type of synth? (I was looking into the alsa documentation, it could be simple solution, but lack of documentation and no examples makes the sound/asound_fm.h rather cryptic). thanks, -- Jozef Henzl FF8D 8342 CCAF 9568 949D A85A 9A97 A629 C68C F890 http://popcorp.org

17 years, 10 months

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Linux-audio-dev May 2007