Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

3 participants
7535 discussions

by benravin

I want to know the optimal buffering which i can use for designing my application. My use case is as follows, I receive digital radio signals through a tuner and does the channel and audio decoding in separate threads. Finally the audio is send to jack callback and played out. How much of buffering is enough for real time streaming between threads. I want keep the optimal buffering between these threads. Please suggest guidelines for using with Jack. -ben -- Sent from: http://linux-audio.4202.n7.nabble.com/linux-audio-dev-f58952.html

8 years, 5 months

[LAD] Drift compensation document

by Benny Alexandar

Hi All, This is my first post to Linux Audio. I had a look at alsa_in/out programs, and the man page says it performs drift compensation for drift between the two clocks. I would like to know more about the implementation details such as the drift compensation using PI controller. Any paper/presentation documents available other than the C code. Please share me the details. -ben

8 years, 5 months

[LAD] sourceforge?

by Will Godfrey

Anyone else having problems pushing commits there? It was fine yesterday, but today I get an instant refusal. No problems with github. -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

8 years, 5 months

[LAD] DSP transients

by Will Godfrey

Does anyone know of software that can log these without significantly adding to the load itself? -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

8 years, 5 months

[LAD] [ANN] Radium 5.0

by Kjetil Matheussen

Radium is a vertical music editor. Radium is inspired by trackers, but uses more graphics to show musical data. Radium also supports MIDI sequencing and hard disk recording. Radium has features like smooth scrolling, zooming, automation, piano roll, embedded Pure Data (Pd), and embedded Faust. * Homepage: http://users.notam02.no/~kjetism/radium/ * Screenshot: http://users.notam02.no/~kjetism/radium/pictures/ radium_4_9_20.png * Videos: http://www.youtube.com/user/KjetilMatheussen/videos * Demonstration video by Tobias Lutzenkirchen showing some of the features: https://www.youtube.com/watch?v=FhwmT0G5EwM (Radium 3.9.1) *Demonstration video showing developing Faust programs inside Radium: https://www.youtube.com/watch?v=LJm9Lox1WFA Changes between 4.8.2 and 5.0.10: * Lots of bug fixes and minor improvements. * Audio: Don't apply volume when bypassing. * Piano roll: Improved eraser functionality. * Editor: Move the swing sub tracks to the left of the piano roll. * Mixer strips: Show automation values. * Mixer strips: Quickly enable or disable plugins and sends. * GUI: Make F11 switch full screen for all windows. * Audio: Scan plugins in a separate process. * Audio: Apply correct initial automation values when starting to play. * Mixer: Configuration editor. * Documentation: Many improvements. * Audio: Always connect and disconnect several connections simultaneously, not one by one. * Mixer strips: Faster graphics. * Menus: Improve keyboard navigation. * Sequencer: Faster to move blocks while playing. * Faust Development: Fix various GUI issues. * Audio: Support Jack transport in order to sample-accurately synchronize to e.g. Ardour or Bitwig. * GUI: Program includes a new "Edit" tab in the main window. * GUI: Fix various keyboard focus issues * 594 other changes. (613 git commits).

8 years, 5 months

[LAD] [ANN] Vee One Suite 0.8.4 - A Late-Summer'17 release

by Rui Nuno Capela

Greetings! The 'Vee One Suite' of old-school software instruments, respectively synthv1 [1], as a polyphonic subtractive synthesizer, samplv1 [2], a polyphonic sampler synthesizer and drumkv1 [3] as yet another drum-kit sampler, welcomes a brand new and fourth member, padthv1 [4] as a polyphonic additive synthesizer, now joining the late-summer'17 release party. All available in dual form: - a pure stand-alone JACK [5] client with JACK-session, NSM [6] (Non Session management) and both JACK MIDI and ALSA [7] MIDI input support; - a LV2 [8] instrument plug-in. And now being the 'gang-of-four'! **synthv1 - an old-school polyphonic synthesizer [1]** synthv1 0.8.4 (late-summer'17) is out! synthv1 is an old-school all-digital 4-oscillator subtractive polyphonic synthesizer with stereo fx. LV2 URI: http://synthv1.sourceforge.net/lv2 change-log: - Disabled "Custom style theme" option on LV2 plug-in form. - Brand new LFO Balance parameter introduced. website: http://synthv1.sourceforge.net downloads: http://sourceforge.net/projects/synthv1/files - source tarball: http://download.sf.net/synthv1/synthv1-0.8.4.tar.gz - source package: http://download.sf.net/synthv1/synthv1-0.8.4-34.rncbc.suse.src.rpm - binary packages (openSUSE Tumbleweed): http://download.sf.net/synthv1/synthv1-0.8.4-34.rncbc.suse.i586.rpm http://download.sf.net/synthv1/synthv1-0.8.4-34.rncbc.suse.x86_84.rpm - AppImage packages (JACK stand-alone only): http://download.sf.net/synthv1/synthv1-0.8.4-1.x86_64.AppImage git repos: http://git.code.sf.net/p/synthv1/code https://github.com/rncbc/synthv1.git https://gitlab.com/rncbc/synthv1.git https://bitbucket.org/rncbc/synthv1.git **samplv1 - an old-school polyphonic sampler [2]** samplv1 0.8.4 (late-summer'17) is out! samplv1 is an old-school polyphonic sampler synthesizer with stereo fx. LV2 URI: http://samplv1.sourceforge.net/lv2 change-log: - Disabled "Custom style theme" option on LV2 plug-in form. website: http://samplv1.sourceforge.net downloads: http://sourceforge.net/projects/samplv1/files - source tarball: http://download.sf.net/samplv1/samplv1-0.8.4.tar.gz - source package: http://download.sf.net/samplv1/samplv1-0.8.4-34.rncbc.suse.src.rpm - binary packages (openSUSE Tumbleweed): http://download.sf.net/samplv1/samplv1-0.8.4-34.rncbc.suse.i586.rpm http://download.sf.net/samplv1/samplv1-0.8.4-34.rncbc.suse.x86_84.rpm - AppImage packages (JACK stand-alone only): http://download.sf.net/samplv1/samplv1-0.8.4-1.x86_64.AppImage git repos: http://git.code.sf.net/p/samplv1/code https://github.com/rncbc/samplv1.git https://gitlab.com/rncbc/samplv1.git https://bitbucket.org/rncbc/samplv1.git **drumkv1 - an old-school drum-kit sampler [3]** drumkv1 0.8.4 (late-summer'17) is out! drumkv1 is an old-school drum-kit sampler synthesizer with stereo fx. LV2 URI: http://drumkv1.sourceforge.net/lv2 change-log: - Disabled "Custom style theme" option on LV2 plug-in form. website: http://drumkv1.sourceforge.net downloads: http://sourceforge.net/projects/drumkv1/files - source tarball: http://download.sf.net/drumkv1/drumkv1-0.8.4.tar.gz - source package: http://download.sf.net/drumkv1/drumkv1-0.8.4-30.rncbc.suse.src.rpm - binary packages (openSUSE Tumbleweed): http://download.sf.net/drumkv1/drumkv1-0.8.4-30.rncbc.suse.i586.rpm http://download.sf.net/drumkv1/drumkv1-0.8.4-30.rncbc.suse.x86_84.rpm - AppImage packages (JACK stand-alone only): http://download.sf.net/drumkv1/drumkv1-0.8.4-1.x86_64.AppImage git repos: http://git.code.sf.net/p/drumkv1/code https://github.com/rncbc/drumkv1.git https://gitlab.com/rncbc/drumkv1.git https://bitbucket.org/rncbc/drumkv1.git **padthv1 - an old-school polyphonic additive synthesizer [4]** padthv1 0.8.4 (late-summer'17) is out! (NEW!) padthv1 is an old-school polyphonic additive synthesizer with stereo fx padthv1 is based on the PADsynth algorithm by Paul Nasca, as a special variant of additive synthesis. LV2 URI: http://padthv1.sourceforge.net/lv2 change-log: - First public release. website: http://padthv1.sourceforge.net downloads: http://sourceforge.net/projects/padthv1/files - source tarball: http://download.sf.net/padthv1/padthv1-0.8.4.tar.gz - source package: http://download.sf.net/padthv1/padthv1-0.8.4-1.rncbc.suse.src.rpm - binary packages (openSUSE Tumbleweed): http://download.sf.net/padthv1/padthv1-0.8.4-1.rncbc.suse.i586.rpm http://download.sf.net/padthv1/padthv1-0.8.4-1.rncbc.suse.x86_84.rpm - AppImage packages (JACK stand-alone only): http://download.sf.net/padthv1/padthv1-0.8.4-1.x86_64.AppImage git repos: http://git.code.sf.net/p/padthv1/code https://github.com/rncbc/padthv1.git https://gitlab.com/rncbc/padthv1.git https://bitbucket.org/rncbc/padthv1.git Licence: The Vee One Suite are free, open-source Linux Audio [9] software, distributed under the terms of the GNU General Public License (GPL) [9] version 2 or later. References: [1] synthv1 - an old-school polyphonic synthesizer http://synthv1.sourceforge.net/ [2] samplv1 - an old-school polyphonic sampler http://samplv1.sourceforge.net/ [3] drumkv1 - an old-school drum-kit sampler http://drumkv1.sourceforge.net/ [4] padthv1 - an old-school polyphonic additive synthesizer http://padthv1.sourceforge.net/ [5] JACK Audio Connection Kit http://jackaudio.org/ [6] NSM, Non Session Management http://non.tuxfamily.org/nsm/ [7] ALSA, Advanced Linux Sound Architecture http://www.alsa-project.org/ [8] LV2, Audio Plugin Standard, the extensible successor of LADSPA http://lv2plug.in/ [9] GNU General Public License http://www.gnu.org/copyleft/gpl.html [10] Linux Audio consortium of libre software for audio-related work http://linuxaudio.org See also: http://www.rncbc.org/drupal/node/1846 Enjoy && have fun ;) -- rncbc aka. Rui Nuno Capela

8 years, 5 months

[LAD] Event Announcement: Sonoj Convention (4th/5th of November 2017, Cologne, Germany) - Music Production and Open Source Software

by info＠sonoj.org

I want to share with you an upcoming event. I would like to ask you to please take notice and help spreading the word by using the notice below for sharing or writing your own announcement. Thank you, Nils Hilbricht on behalf of the Sonoj Team Name of the event: Sonoj Convention Date: 4th and 5th of November 2017 Website: https://www.sonoj.org Location: Cologne, Germany Admission Free - Registration mandatory, limited to 50 visitors The Sonoj Convention is an event on the 4th and 5th of November 2017 in Cologne, Germany. Admission is free. You will be able to enjoy demonstrations, talks and workshops about music production through open source software. Hands-on tutorials and workflow presentations can be expected. The Sonoj Convention is a great opportunity to meet like-minded people, maybe even to have engaging discussions! Every man and woman is welcome, no matter your musical or technological background. An event like the Sonoj Convention does not exist yet. While commercial and closed-source products have plenty of platforms the open source, and sometimes hobbyist, scene does not. The official website https://www.sonoj.org offers a simple way to register as a visitor for free as well as more information, such as an overview of our talks, demonstrations and workshop (e.g. "Boring Music and How to Make it Interesting" or "Creating a Radio Drama with Ardour (for Beginners)"). If you can't attend personally but want to support the convention you can donate to our small fundraising-campaign ("Donation" on the website) and help covering our expenses.

8 years, 6 months

[LAD] USB audio interface

by Thijs van severen

hi all I know this question pops up every couple of months (repeat,repeat,repeat) but since i cant find any up to date info, i'll ask it anyway :-) I'm looking for a new audio interface with these minimum specs : - USB - plug-and-play (as in 'works OOTB with no extra drivers needed or compiling anything') - 8 in (minimum 2 mic ins) - 8 out - no internal DSP or hardware mixer (unless it is possible to config using a native linux app) - i will be using this live on stage so it needs to be solid and low latency - 500eur max I have checked out all the usual 'hardware compatibility' matrix wikis and related websites but 90% of that info is outdated, hence this mail All suggestions are welcome ! Grtz Thijs -- follow me on my Audio & Linux blog <http://audio-and-linux.blogspot.com/> !

8 years, 6 months

[LAD] Job opportunity Linux audio/C++ in Oldenburg, Germany

by Giso Grimm

Dear Linux Audio community, please find below a link to a job opportunity in Oldenburg, Germany, in the field of open source software development: http://www.hoertech.de/en/h%C3%B6rtech/career.html The work is mainly development in C++ for the Master Hearing Aid, which we presented back in 2009 at the LAC in Parma (http://lac.linuxaudio.org/2009/cdm/Friday/07_Grimm/index.html), and which will become open source within the next months. The job position is at a small company in a team of developers, with close collaboration with the university of Oldenburg. For details, please see the link above. Best regards, Giso _______________________________________________ Linux-audio-user mailing list Linux-audio-user(a)lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-user

8 years, 6 months

Re: [LAD] [BrlCV] My attempt of linking Linux to Eurorack

by Kjetil Matheussen

> Mario Lang: > > #include <jack.hpp> > > #include <boost/accumulators/accumulators.hpp> > #include <boost/accumulators/statistics.hpp> > > template<typename... Features> > using AudioAccumulatorSet = boost::accumulators::accumulator_set< > float, boost::accumulators::features<Features...> > >; > > using Count = boost::accumulators::tag::count; > using Max = boost::accumulators::tag::max; > using Min = boost::accumulators::tag::min; > using Mean = boost::accumulators::tag::mean; > using Variance = boost::accumulators::tag::variance; > > class Statistics final : public JACK::Client { > JACK::AudioIn In; > AudioAccumulatorSet<Count, Max, Mean, Min, Variance> Accumulator; > > public: > Statistics() : JACK::Client("Statistics"), In(createAudioIn("In")) {} > int process(std::uint32_t FrameCount) override { > for (auto &Value: In.buffer(FrameCount)) Accumulator(Value); > return 0; > } > auto max() const { return boost::accumulators::max(Accumulator); } > auto mean() const { return boost::accumulators::mean(Accumulator); } > auto min() const { return boost::accumulators::min(Accumulator); } > auto sampleCount() const { return boost::accumulators::count(Accumulator); > } > auto variance() const { return boost::accumulators::variance(Accumulator); > } > }; > > Nice code. But I wonder about one small thing related to C++. Couldn't these max/mean/etc. methods in the Statististics class be written shorter like this?: auto max() const { return Max(Accumulator); } auto mean() const { return Mean(Accumulator); } auto min() const { return Min(Accumulator); } auto sampleCount() const { return Count(Accumulator); } auto variance() const { return Variance(Accumulator); } Sorry if it's a stupid question, but I haven't used "using" in C++ yet. :-) Also thanks for demonstrating these things from boost.

8 years, 6 months

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Linux-audio-dev