Linux-audio-dev

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3 participants
7520 discussions

by Reuben Martin

I thought I would post this since there was a big conversation here a while back about AES67 and the slow death of AVB due to lack of support. Well I was talking with a guy from Meyer Sound who told me that AVB has been resurrected from the dead. Apparently Cisco and other large network hardware vendors were willing to back it as long as it was made more generic to accommodate industrial uses that are also time-sensitive. So apparently it has been re-branded as “Time-Sensitive Networking” and has a lot more momentum behind it. http://en.wikipedia.org/wiki/Time-Sensitive_Networking http://www.commercialintegrator.com/article/rebranding_avb_4_key_takeaways_… So make of it what you will. :) I just found it to be interesting. -Reuben

10 years, 5 months

Details about Mackie Control or Mackie Human User Interface

by Takashi Sakamoto

Hi all, I'm a ALSA developer. I currently focus on developing sound drivers for devices on IEEE 1394 bus. In this developing period for Linux 4.3, I'm working for TASCAM FireWire series such as FW-1884 and FW-1082. Well, are there some developers who have enough knowledgement about MIDI messaging rule for Mackie Control or Mackie Human User Interface(HUI)? As long as investigating FW-1082 and FW-1884, these two models transfer control messages over IEEE 1394 isochronous packets, The shape of these messages is similar to bitmap. In detail, see my RFC on alsa-devel: [alsa-devel] [RFC][PATCH 26/37] ALSA: firewire-tascam: add MMAP support to show status and control message http://mailman.alsa-project.org/pipermail/alsa-devel/2015-July/094817.html To enable userspace applications to handle these messages, a converter to MIDI messages is required, as Windows/OS X drivers did. In my original plan, I off-load this task to userspace driver applications by adding mmap(2)ed page. While, due to some reasons, it's better to implement the converter into kernel driver. As long as I know, for these models, there're three types of the converter; usual MIDI messages such as Control Change (CC), Mackie Control and Mackie Human User Interface, while I have a little knowledgement about the latter two types. For this occasion, I want to know the details. If a cost to implement one of these two types, I'll use it for the converter. Else, I use usual MIDI messages for my patchset to ALSA upstream. Thanks Takashi Sakamoto

10 years, 5 months

[ANN] Summer'15 release frenzy pt.2 - Qsampler 0.3.1 is out!

by Rui Nuno Capela

The Summer'15 release frenzy continues... ;) On the wake of LinuxSampler 2.0.0 release [1], Qsampler 0.3.1 is out! [2] And it lands at the precise moment sourceforge.net outage disaster [5] is still going through hopefully out of recovery hell. Also worth noting is that Qsampler [2] is now raked as a genuine Qt5 [3] application, leaving Qt4 behind but still an option. Qsampler [2] is a LinuxSampler [1] GUI front-end application written in C++ around the Qt [3] framework using Qt Designer. Website: http://qsampler.sourceforge.net (still unavailable [5] at this time :() Downloads: - source tarballs: http://download.linuxsampler.org/packages/ http://download.linuxsampler.org/packages/qsampler-0.3.1.tar.bz2 - binary packages: http://download.linuxsampler.org/packages/rpms/ http://download.linuxsampler.org/packages/rpms/qsampler-0.3.1-16.rncbc.suse… http://download.linuxsampler.org/packages/rpms/qsampler-0.3.1-16.rncbc.suse… Change-log: - Fixed configure script's Qt include directory lookup for some 64bit Linux flavours. - Prefer Qt5 over Qt4 by default with configure script. - A new top-level widget window geometry state save and restore sub-routine is now in effect. (EXPERIMENTAL) - Fixed for some strict tests for Qt4 vs. Qt5 configure builds. License: Qsampler [2] is free, open-source software, distributed under the terms of the GNU General Public License (GPL [4]) version 2 or later. See also: http://www.rncbc.org/drupal/node/914 References: [1] http://www.linuxsampler.org [2] http://qsampler.sourceforge.net [3] http://qt.io [4] http://www.gnu.org/copyleft/gpl.html [5] http://sourceforge.net/blog/sourceforge-infrastructure-and-service-restorat… Enjoy && have fun! -- rncbc aka. Rui Nuno Capela

10 years, 5 months

[ANN] QjackCtl 0.4.0 is out!

by Rui Nuno Capela

Hi all, as in through the hottest of summers--as southerners can't even wait--here comes part one: QjackCtl 0.4.0 (summer'15) is out! though aside that everybody knows this already, QjackCtl is a (maybe not so any more but) simple Qt [3] application to control the JACK [2] sound server, for the Linux Audio infrastructure. website: http://qjackctl.sourceforge.net downloads: http://sourceforge.net/projects/qjackctl/files - source tarball: http://download.sourceforge.net/qjackctl/qjackctl-0.4.0.tar.gz - source package: http://download.sourceforge.net/qjackctl/qjackctl-0.4.0-23.rncbc.suse132.sr… - binary packages: http://download.sourceforge.net/qjackctl/qjackctl-0.4.0-23.rncbc.suse132.i5… http://download.sourceforge.net/qjackctl/qjackctl-0.4.0-23.rncbc.suse132.x8… Change-log: - Some windows fixes added (patch by Kjetil Matheussen, thanks). - Most advanced Setup/Settings are moved into new Setup/Advanced settings tab; limit range for the real-time priority setting, now having 6 as absolute minimum valid value (after patches by Robin Gareus, thanks). - A new top-level widget window geometry state save and restore sub-routine is now in effect (EXPERIMENTAL) - Delayed geometry setup for widget windows upon startup has been deprecated and scrapped altogether. - Setup/settings dialog tab is going into some layout changes; also got rid of old patchbay auto-refresh timer cruft, which was previously hidden/disabled. - New socket names are now automatically inferred from selected client names while on the Patchbay widget, Socket dialog. - Fixed for some strict tests for Qt4 vs. Qt5 configure builds. - German (de) translation update (by Guido Scholz, thanks). License: QjackCtl stands free, still open-source software, distributed under the terms of the GNU General Public License (GPL [4]) version 2 or later. Weblog (upstream support): http://www.rncbc.org See also: http://www.rncbc.org/drupal/node/912 References: [1] QjackCtl - A JACK Audio Connection Kit Qt GUI Interface http://qjackctl.sourceforge.net [2] JACK Audio Connection Kit http://jackaudio.org [3] Qt framework, C++ class library and tools for cross-platform application and UI development http://qt.io/ [4] GPL - GNU General Public License http://www.gnu.org/copyleft/gpl.html Enjoy && have a whole hot'ta Summer'15 fun! -- rncbc aka. Rui Nuno Capela

10 years, 5 months

Advanced Gtk+ Sequencer v0.5.0

by Joël Krähemann

Hi all GSequencer has a new minor release v0.5.0. Some highlights are: * concurrent audio tree processing * Multi-Output * Improved notation & pattern editor * Add custom LADSPA widgets to control ports * ... Please visit: http://gsequencer.org cheers, Joël

10 years, 5 months

Re: [LAD] [alsa-devel] Fw: Using loopback card to Connect GSM two way call to the real sound card UDA1345TS

by Clemens Ladisch

Srinivasan S wrote: > Am facing overrun & underrun issues, when I run the the above GSM application with the attached asound.conf The sound card and the GSM streams are not synchronized. You need to compensate for the drift between the clocks, typically by resampling. (Jack's alsa_in/alsa_out would automatically do this.) Regards, Clemens

10 years, 5 months

Linux Audio Berlin meetup this Wednesday

by Bruno Gola

Hello! The Linux Audio Berlin meetup happens every first Wednesday of the month. This month's meeting will be (again) at C-Base at 19:30. For more info please join the mailing list: http://linuxaudio.berlin/mailman/listinfo/discuss (sorry for cross-posting!) Hope to see you all, -- Bruno Gola <brunogola(a)gmail.com> http://bgo.la/

10 years, 5 months

Call for testing: new ALSA driver for Digi 002/003 family

by Takashi Sakamoto

Hi all, This is a call-for-testing of my new ALSA driver for Digidesign 002/003 family. If you have these devices, would you please test the driver with your devices and report your experience about it. Especially, I want you to test MIDI port for machine control, because developers have no 'console' models, just tested with 'rack' models. When installing and testing, please follow this instructions: https://github.com/takaswie/snd-firewire-improve Patchset was already posted to alsa-devel and confirmed to playback/capture PCM samples/MIDI messages by ALSA applications. [alsa-devel] [RFC v2][PATCH 00/11] digi00x: new driver for Digidesign 002/003 family http://mailman.alsa-project.org/pipermail/alsa-devel/2015-March/089708.html Several issues are still remained: * The port for MIDI machine control message is not tested yet, because 002/003 console model are required. * When allocates 2 or more channel numbers for the device, after 15 to 20 seconds from playbacking, any PCM samples causes noisy sound. Then, all of LED on the front panel light. The streaming still continues correctly. * The actual effects of external clock source is not clear. When set the clock source is somewhat external, even if stopping the clock source, the device continues to sound PCM samples against my expectation. * The meaning of asynchronous messages is unknown. This patchset adds a functionality to receive it in userspace. You can test it with updated libhinawa sample script. https://github.com/takaswie/libhinawa In my plan, this patchset will proposed for Linux 4.2. But these issues need to be clear till the merge-window. Regards Takashi Sakamoto

10 years, 6 months

Vamp plugin SDK v2.6 now available

by Chris Cannam

Version 2.6 of the Vamp plugin SDK is now available. http://www.vamp-plugins.org/ Vamp is a plugin API for audio analysis and feature extraction plugins written in C or C++. Its SDK features an easy-to-use set of C++ classes for plugin and host developers, a reference host implementation, example plugins, and documentation. It is supported across Linux, OS/X, and Windows. A documentation guide to writing plugins using the Vamp SDK can be found at http://www.vamp-plugins.org/guide.pdf. Version 2.6 is a bugfix and minor enhancement release. For more details, see the changelog at http://code.soundsoftware.ac.uk/projects/vamp-plugin-sdk/repository/entry/C… Chris

10 years, 6 months

JACK sample rate pull up/down

by Reuben Martin

Does anybody know if there is any way to pull up/down with JACK? And if there is, can ALSA deal with it very gracefully? -Reuben

10 years, 6 months

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Linux-audio-dev