Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

4 participants
7502 discussions

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: > I didn't understand what is 'two channel devices' does The two channels are "left" and "right". > Regarding bindings as you explained"bindings.x y" or "bindings { x y }" maps channel x of this device to > channel y of the slave device. > > I didn't understand channel x of this device means is it the real sound card??? which is the current device ie., channel x of this device means??? > > I didn't understand channel y of the slave device means??.. ie., which is slave device here???? "This device" is the virtual device that is defined. The slave device is the device whose name is specified with "slave.pcm". Regards, Clemens

10 years, 3 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: > CPU consumption is 18%, with above asound.conf & the app > alsa_loopback_min_mono.c for establishing my GSM two way call (ie., > VINR to VOUTR & VINL to VOUTL) , this is very huge & I want to reduce > this CPU consumption drastically, Is there any other ways in alsa where > I can do this two way GSM call (ie., VINR to VOUTR & VINL to VOUTL) > without using alsa_loopback_min_mono.c application dmix needs more CPU than dshare because it needs to mix multiple streams together; if possible, use dshare instead of dmix. dshare needs more CPU than direct access to the device because the data needs to be copied and reformatted. dshare is needed only when the application(s) cannot handle the format of the actual device; if possible, change your application to handle the two-channel devices. > And am hearing echo, when I do GSM calls when using the above attachd > asound.conf & the app alsa_loopback_min_mono.c, could you please help > me out is there any options to do echo cancellation in alsa? ALSA has not built-in echo cancellation. You have to implement this yourself, or use some third-party library. If dmix/dshare alone eats 18 % CPU, it is unlikely that this is feasible without hardware support. > Am trying to completely understand the above attched asound.conf, but > am not still very clear w.r.t the understanding of bindings "bindings.x y" or "bindings { x y }" maps channel x of this device to channel y of the slave device. Regards, Clemens

10 years, 3 months

Re: [LAD] Call for testing: new ALSA driver for Digi 002/003 family

by Takashi Sakamoto

Hi Damien, On Apr 02 2015 09:28, Damien Zammit wrote: > On 02/04/15 09:41, Takashi Sakamoto wrote: >> Several issues are still remained: >> * 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. > I have not seen this behaviour with your latest driver, Takashi. > I think you would see this if the midi quadlet is confused with the pcm > quadlets and you feed audio data into the midi port. (I have seen this > before) The channel is *not* PCM or MIDI, it's IEEE 1394 isochronous resource channels. I shouhd have mention about it, sorry. In short, when two or more devices are connected on the same IEEE 1394 bus, the driver may cause the issue (or not). >> * 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. > > I have successfully tested the device with ADAT and SPDIF sync. When I > connect external clock source to the SPDIF-in port and send > 0xffffe0000118 1 the SPDIF led light turns on and the streaming now > syncs to the new clock. A flashing Sync led means that the sample rates > are mismatched and the sync is not working correctly. But sync works > well when sample rates are matched. OK. My Digi 002 Rack has no LEDs to show current clock source, so I have no way to check the actual sync in my eyes. I request you to test stopping the supply of clock source during streaming. I expect the streaming is stopped suddenly, then PCM playback/capturing also stop. > I tried 0x011c but I am not convinced that this is related to ADAT at > all. I think it is a switch to select the mode of SPDIF between > consumer and pro SPDIF modes? I am guessing here but SPDIF sync no > longer works when I toggle the mode to 1, and it has no effect when I > attach ADAT cable and sync to ADAT, then toggling the mode does nothing. In my Digi 002 Rack, it's a selector between S/PDIF or ADAT for optical input/output interfaces. If not in your Digi 003+, this seems to be model-dependent issue and I'll drop it from the driver (digi00x-proc.c). Regards Takashi Sakamoto

10 years, 3 months

Re: [LAD] Call for testing: new ALSA driver for Digi 002/003 family

by Damien Zammit

On 02/04/15 11:28, Damien Zammit wrote: > On 02/04/15 09:41, Takashi Sakamoto wrote: >> Several issues are still remained: >> * 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. > I have not seen this behaviour with your latest driver, Takashi. > I think you would see this if the midi quadlet is confused with the pcm > quadlets and you feed audio data into the midi port. (I have seen this > before) > >> * 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. > I have successfully tested the device with ADAT and SPDIF sync. When I > connect external clock source to the SPDIF-in port and send > 0xffffe0000118 1 the SPDIF led light turns on and the streaming now > syncs to the new clock. A flashing Sync led means that the sample rates > are mismatched and the sync is not working correctly. But sync works > well when sample rates are matched. > > I tried 0x011c but I am not convinced that this is related to ADAT at > all. I think it is a switch to select the mode of SPDIF between > consumer and pro SPDIF modes? I am guessing here but SPDIF sync no > longer works when I toggle the mode to 1, and it has no effect when I > attach ADAT cable and sync to ADAT, then toggling the mode does nothing. > > Damien >

10 years, 3 months

jack2 API

by Vaclav Mach

Hi, I wrote some code (in C++) using JACK1 API. It was quite easy to do that with a plenty of example files. Recently, I tried to utilize C++ libraries provided in JACK2 because I don't like mixing OO code with C api. There are a lot of C++ classes in JACK2 but I'm not able to link/include them. For example: instead of #include <jack/jack.h> I'm trying to #include "jack2/JackServer.h". There are no example files. What am I doing wrong? Or is it a bad way of using JACK2? Thanks, Vaclav

10 years, 3 months

[ANN] Qtractor 0.6.6 - The Lazy Tachyon is out!

by Rui Nuno Capela

And finally, for the wrap of the pre-LAC2015@JGU-Mainz [1] release party, no other than the 'crown jewel' of the whole Qstuff* bunch ;) Qtractor 0.6.6 (lazy tachyon beta) is out! Release highlights: * LV2 and VST plugins GUI position persistence (NEW) * MIDI clip editor record/overdub note rendering (FIX) * VST plugin recursive discovery/search path (NEW) * VST-shell sub-plugins support (FIX) * also some old and new lurking bugs squashed. Qtractor [2] is an audio/MIDI multi-track sequencer application written in C++ with the Qt4 framework. Target platform is Linux, where the Jack Audio Connection Kit (JACK [3]) for audio and the Advanced Linux Sound Architecture (ALSA [4]) for MIDI are the main infrastructures to evolve as a fairly-featured Linux desktop audio workstation GUI, specially dedicated to the personal home-studio. Website: http://qtractor.sourceforge.net Project page: http://sourceforge.net/projects/qtractor Downloads: http://sourceforge.net/projects/qtractor/files - source tarball: http://download.sourceforge.net/qtractor/qtractor-0.6.6.tar.gz - source package (openSUSE 13.2): http://download.sourceforge.net/qtractor/qtractor-0.6.6-16.rncbc.suse132.sr… - binary packages (openSUSE 13.2): http://download.sourceforge.net/qtractor/qtractor-0.6.6-16.rncbc.suse132.i5… http://download.sourceforge.net/qtractor/qtractor-0.6.6-16.rncbc.suse132.x8… - quick start guide & user manual (see also: the wiki): http://download.sourceforge.net/qtractor/qtractor-0.5.x-user-manual.pdf - wiki (help really wanted!): http://sourceforge.net/p/qtractor/wiki/ Weblog (upstream support): http://www.rncbc.org License: Qtractor is free, open-source software, distributed under the terms of the GNU General Public License (GPL [5]) version 2 or later. Change-log: - MIDI clip record/reopen to/from SMF format 0 has been fixed. - LV2 and VST plugins GUI editor widget position is preserved across hide/show cycles. - Added application description as freedesktop.org's AppData [6]. - Added a "Don't ask this again" prompt option to zip/archive extrated directory removal/replace warning messages. - MIDI clip editor (aka. piano-roll) gets lingering notes properly shown while on record/overdubbing. - Current highlighted client/port connections are now drawn with thicker connector lines. - Fixing segfaults due to QClipboard::mimeData() returning an invalid null pointer while on Qt5 and Weston. - Return of an old hack/fix for some native VST plugins with GUI editor, on whether to skip the explicit shared library unloading on close and thus avoid some mysterious crashes on session and/or application exit. - Force reset of plugin selection list when any of the plugin search paths change (in View/Options.../Plugins/Paths). - Recursive VST plugin search is now in effect for inventory and discovery on path sub-directories (VST only). - Non-dummy scannig for regular VST, non-shell plugins, were doomed to infinite-loop freezes on discovery, now fixed. References: [1] LAC2015@JGU-Mainz - Linux Audio Conference 2015 The Open Source Music and Sound Conference April 9-12 @ Johannes Gutenberg University (JGU) Mainz, Germany http://lac.linuxaudio.org/2015/ [2] Qtractor - An audio/MIDI multi-track sequencer http://qtractor.sourceforge.net [3] JACK Audio Connection Kit http://jackaudio.org [4] ALSA, Advanced Linux Sound Architecture http://www.alsa-project.org/ [5] GPL - GNU General Public License http://www.gnu.org/copyleft/gpl.html [6] AppData Specification http://people.freedesktop.org/~hughsient/appdata/ See also: http://www.rncbc.org/drupal/node/879 Enjoy && keep the fun. -- rncbc aka. Rui Nuno Capela

10 years, 3 months

io GNU/Linux 2015.02 released

by Manu Kebab

Hi guys, One week fixing most annoying bugs and improving: - Sound system (JACK2+PulseAudio) control and robustness - Hard-disk installer (need testing, be careful) and much more... I'm glad to share with you io GNU/Linux 2015.02 :) Both 32 and 64 bits are available for download. Packages lists: http://io.gnu.linux.free.fr/2015.02/io-live--e18-3.16.7-ckt7-686-pae--2015.… (32-bit) http://io.gnu.linux.free.fr/2015.02/io-live--e18-3.16.7-ckt7-amd64--2015.02… (64-bit) Enjoy ;)

10 years, 3 months

Return with us now to those thrilling days !

by Dave Phillips

Greetings, Something to put smiles on faces: http://linux-sound.org/lms1999/ The state of Linux audio software, February 1999. Best, dp

10 years, 3 months

[ANN] QjackCtl 0.3.13, Qsynth 0.3.9, Qsampler 0.3.0 released!

by Rui Nuno Capela

The pre-LAC2015 [1] release frenzy continues... ;) Now for the next batch... * QjackCtl - A JACK Audio Connection Kit Qt GUI Interface [2] * QjackCtl 0.3.13 is out. QjackCtl is a simple Qt application to control the JACK [4] sound server, for the Linux Audio infrastructure. website: http://qjackctl.sourceforge.net downloads: http://sourceforge.net/projects/qjackctl/files - source tarball: http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.13.tar.gz - source package: http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.13-22.rncbc.suse132.… - binary packages: http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.13-22.rncbc.suse132.… http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.13-22.rncbc.suse132.… change-log: - Added application description as freedesktop.org's AppData [9]. - Setup dialog form is now modeless. - Introducing brand new active patchbay reset/disconnect-all user preference option. - Current highlighted client/port connections are now drawn with thicker connector lines. - New user preference option on whether to show the nagging 'program will keep running in the system tray' message, on main window close. - Connections lines now drawn with anti-aliasing; connections splitter handles width is now reduced. - Drop missing or non-existent patchbay definition files from the most recent used list. * Qsynth - A FluidSynth Qt GUI Interface [3] * Qsynth 0.3.9 is out. Qsynth is a FluidSynth [6] GUI front-end application written in C++ around the Qt4 toolkit using Qt Designer. website: http://qsynth.sourceforge.net downloads: http://sourceforge.net/projects/qsynth/files - source tarball: http://downloads.sourceforge.net/qsynth/qsynth-0.3.9.tar.gz - source package: http://downloads.sourceforge.net/qsynth/qsynth-0.3.9-5.rncbc.suse132.src.rpm - binary packages: http://downloads.sourceforge.net/qsynth/qsynth-0.3.9-5.rncbc.suse132.i586.r… http://downloads.sourceforge.net/qsynth/qsynth-0.3.9-5.rncbc.suse132.x86_84… change-log: - Added application description as freedesktop.org's AppData [9]. - New user preference option on whether to show the nagging 'program will keep running in the system tray' message, on main window close. - Application close confirm warning is now raising the main window as visible and active for due top level display, especially applicable when minimized to the system tray. - A man page has been added. - Translations install directory change. - Allow the build system to include an user specified LDFLAGS. - Czech (cs) translation updated (by Pavel Fric, thanks). * Qsampler - A LinuxSampler Qt GUI Interface [4] * Qsampler 0.3.0 is out. Qsampler is a LinuxSampler [7] GUI front-end application written in C++ around the Qt4 toolkit using Qt Designer. website: http://qsampler.sourceforge.net downloads: http://sourceforge.net/projects/qsampler/files - source tarball: http://downloads.sourceforge.net/qsampler/qsampler-0.3.0.tar.gz - source package: http://downloads.sourceforge.net/qsampler/qsampler-0.3.0-13.rncbc.suse132.s… - binary packages: http://downloads.sourceforge.net/qsampler/qsampler-0.3.0-13.rncbc.suse132.i… http://downloads.sourceforge.net/qsampler/qsampler-0.3.0-13.rncbc.suse132.x… change-log: - Added application description as freedesktop.org's AppData [9]. - Added this "Don't ask/show this again" option to some if not most of the nagging warning/error message boxes. - Mac OS X: Fixed default path of linuxsampler binary. - When closing qsampler and showing the user the dialog whether to stop the LinuxSampler backend, set the default selection to "Yes". - Master volume slider now getting proper layout when changing its main toolbar orientation. - Messages standard output capture has been slightly improved as for non-blocking i/o, whenever available. - Adjusted configure check for libgig to detect the new --includedir. - A man page has beed added (making up Matt Flax's work on debian, thanks). - Translations install directory change. - Added support for SF2 instrument names/preset enumeration. - Added instrument list popup on channel strip which shows up when the instrument name is clicked. Allows faster switching among instruments of the same file. - Adjusted configure check for libgig to detect its new --libdir (impolitely forcing the user now to have at least libgig 3.3.0). License: QjackCtl, Qsynth and Qsampler are free, open-source software, distributed under the terms of the GNU General Public License (GPL) version 2 [8] or later. Weblog (upstream support): http://www.rncbc.org See also: http://www.rncbc.org/drupal/node/877 References: [1] LAC2015@JGU-Mainz - Linux Audio Conference 2015 The Open Source Music and Sound Conference April 9-12 @ Johannes Gutenberg University (JGU) Mainz, Germany http://lac.linuxaudio.org/2015/ [2] QmidiCtl - A JACK Audio Connection Kit Qt GUI Interface http://qmidictl.sourceforge.net [3] Qsynth - A FluidSynth Qt GUI Interface http://qsynth.sourceforge.net [4] Qsampler - A LinuxSampler Qt GUI Interface http://qsampler.sourceforge.net [5] JACK Audio Connection Kit http://jackaudio.org [6] FluidSynth - A SoundFont Synthesizer A real-time software synthesizer based on SoundFont 2 specifications http://www.fluidsynth.org [7] LinuxSampler - The Linux Sampler Project A modular, streaming capable, realtime audio sampler http://www.linuxsampler.org [8] GPL - GNU General Public License http://www.gnu.org/copyleft/gpl.html [9] AppData Specification http://people.freedesktop.org/~hughsient/appdata/ Enjoy && have some fun! -- rncbc aka. Rui Nuno Capela

10 years, 3 months

[ANN] QmidiNet 0.2.1, QmidiCtl 0.2.0 released!

by Rui Nuno Capela

The pre-LAC2015 [1] pre-season has just been started! Here goes the first batch... ;) * QmidiNet - A MIDI Network Gateway via UDP/IP Multicast [2] * QmidiNet 0.2.1 released! QmidiNet [2] is a MIDI network gateway application that sends and receives MIDI data (ALSA-MIDI and JACK-MIDI) over the network, using UDP/IP multicast. Inspired by multimidicast [4] and designed to be compatible with ipMIDI [5] for Windows. Website: http://qmidinet.sourceforge.net Project page: http://sourceforge.net/projects/qmidinet Downloads: http://sourceforge.net/projects/qmidinet/files - source tarballs: http://downloads.sourceforge.net/qmidinet/qmidinet-0.2.1.tar.gz - source package (openSUSE 13.2): http://downloads.sourceforge.net/qmidinet/qmidinet-0.2.1-7.rncbc.suse132.sr… - binary packages (openSUSE 13.2): http://downloads.sourceforge.net/qmidinet/qmidinet-0.2.1-7.rncbc.suse132.i5… http://downloads.sourceforge.net/qmidinet/qmidinet-0.2.1-7.rncbc.suse132.x8… * QmidiCtl - A MIDI Remote Controller via UDP/IP Multicast [3] * QmidiCtl 0.2.0 released! QmidiCtl [3] is a MIDI remote controller application that sends MIDI data over the network, using UDP/IP multicast. Inspired by multimidicast [4] and designed to be compatible with ipMIDI [5] for Windows. QmidiCtl has been primarily designed for the Maemo enabled handheld devices, namely the Nokia N900 and also being promoted to the Maemo Package repositories. Nevertheless, QmidiCtl may still be found effective as a regular desktop application as well. Website: http://qmidictl.sourceforge.net Project page: http://sourceforge.net/projects/qmidictl Downloads: http://sourceforge.net/projects/qmidictl/files - source tarballs: http://downloads.sourceforge.net/qmidictl/qmidictl-0.2.0.tar.gz - source package (openSUSE 13.2): http://downloads.sourceforge.net/qmidictl/qmidictl-0.2.0-6.rncbc.suse132.sr… - binary packages (openSUSE 13.2): http://downloads.sourceforge.net/qmidictl/qmidictl-0.2.0-6.rncbc.suse132.i5… http://downloads.sourceforge.net/qmidictl/qmidictl-0.2.0-6.rncbc.suse132.x8… Weblog (upstream support): http://www.rncbc.org License: Both QmidiNet and QmidiCtl are free, open-source software, distributed under the terms of the GNU General Public License (GPL) version 2 [6] or later. Change-log: - Reset (to network defaults) button added to options dialog, which also gets some layout reform. - Added application description as freedesktop.org's AppData [7]. - Previously hard-coded UDP/IP multicast address (225.0.0.37) is now an user configurable option. - A man page has beed added. (QmidiCtl backlog) - Allow the build system to include an user specified LDFLAGS. (QmidiCtl backlog) See also: http://www.rncbc.org/drupal/node/876 References: [1] LAC2015@JGU-Mainz - Linux Audio Conference 2015 The Open Source Music and Sound Conference April 9-12 @ Johannes Gutenberg University (JGU) Mainz, Germany http://lac.linuxaudio.org/2015/ [2] QmidiNet - A MIDI Network Gateway via UDP/IP Multicast http://qmidinet.sourceforge.net [3] QmidiCtl - A MIDI Network Gateway via UDP/IP Multicast http://qmidinet.sourceforge.net [4] multimidicast - sends and receives MIDI from ALSA sequencers over network http://llg.cubic.org/tools/multimidicast [5] ipMIDI - MIDI over Ethernet ports - send MIDI over your LAN http://nerds.de [6] GPL - GNU General Public License http://www.gnu.org/copyleft/gpl.html [7] AppData Specification http://people.freedesktop.org/~hughsient/appdata/ Cheers && Enjoy -- rncbc aka Rui Nuno Capela

10 years, 3 months

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

Linux-audio-dev