Linux-audio-dev

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7513 discussions

Sonoj Convention 2019 Announcement: Visitor registration, Call for talks, Donations

by Sonoj Convention

Dear Linux Audio Developers, The third annual Sonoj Convention ( https://www.sonoj.org ) will be taking place this upcoming October 26th-27th 2019 in Cologne, Germany. The convention is focusing on the combination of music production and open source software with a priority on practical music production. At Sonoj there will be talks, demonstrations, and workshops from demonstrating basic workflows to detailed instructions on how to subtly improve your sound. While the event will take place in Germany, all presentations and workshops will be in English, recorded and streamed to make them easily accessible to a wide audience. We want to welcome everyone, regardless of your musical or technical background. To get a better idea of what to expect out of Sonoj, you can find information and recordings from last year's convention in our archives: ( https://sonoj.org/archive ) As it was last year, admission to the convention is free, though donations are very much welcome. - Visitor Registration is now possible. The space is limited so please register on our website now. ( https://sonoj.org/register.html ) - We are looking for talks, demonstrations and workshops. If you would like to contribute, please send an informal and short e-mail with your ideas to info(a)sonoj.org - Donations are very welcome. Even if you don't attend personally please consider supporting a non-profit event to promote open source music making and production. We accept direct bank transfer and paypal ( https://www.sonoj.org/donate.html ) Yours, Nils Hilbricht https://www.sonoj.org

6 years

Web Audio Conference 2019 - Call for Diversity Tickets

by Gerard Roma

*Apologies for cross-postings* # Web Audio Conference 2019 - Call For Diversity Tickets https://www.ntnu.edu/wac2019/call-for-diversity We have a limited number of diversity tickets available to attend the Web Audio Conference 2019 in Trondheim (4-6 December, 2019), thanks to our sponsors (https://ntnu.edu/wac2019/sponsors). This may cover your conference ticket and/or travels as an author or other attender. We have also tried to keep the conference fees as low as possible to encourage interested attendees to come (https://www.ntnu.edu/wac2019/registration). The diversity tickets will be prioritized for attenders from lower-income countries and backgrounds, and underrepresented communities in web audio. To be eligible, you need to fill in the following online survey telling us how we can help you, which should take 5-10 minutes: http://tiny.cc/WAC19-call-diversity An expert diversity committee is constituted who will decide from the candidates by September 15, 2019. ## Important dates * September 8, 2019 (Anywhere on Earth): Deadline diversity tickets application. * September 15, 2019: Notification of grantees. * September 22, 2019: Deadline early-bird ticket. * December 4-6, 2019: The conference. Please do not hesitate to contact the diversity committee, diversity(a)wac2019.ntnu.no, if you have questions. You can find more information about the diversity theme here: https://www.ntnu.edu/wac2019/diversity-theme Also, you can find a preliminary draft of the programme and a list of conference venues on our website: https://www.ntnu.edu/wac2019/programme https://www.ntnu.edu/wac2019/venues-and-maps

6 years

IRT gets it: open-source libraries for object-based audio

by Jörn Nettingsmeier

Hi *! Haven't checked this out in any detail, but the German Institut für Rundfunktechnik (a sort of science outsourcing provider for public broadcast over here, with an impressive track record of ground-breaking work) have released a substantial body of code on object-based audio under an Apache open-source license: https://lab.irt.de/more-open-source-for-open-object-based-audio-workflows/ If anyone gets interested and finds it useful, please give them a little shout-out - I guess our fellow open-source enthusiasts within those institutions can use some support! All best, Jörn -- Jörn Nettingsmeier Tuinbouwstraat 180, 1097 ZB Amsterdam, Nederland Tel. +49 177 7937487 Meister für Veranstaltungstechnik (Bühne/Studio), Tonmeister VDT http://stackingdwarves.net

6 years, 1 month

Proscenion

by Benoît Rouits

Hello list, old reader of the LAU list, i decided to subscribe to the LAD to present a little project i wrote, proscenion. Proscenion is a (GPL) software that renders true phase stereo with Jack by placing jack sources into a graphical canvas and reap the stereo capture rendered on the fly. The software is not perfect and not very well written, but it is functionnal. It is written upon Gtk3 and GooCanvas: http://brouits.free.fr/proscenion/ https://gitlab.gnome.org/be1/proscenion/ Hope you will like it and ban panpot stereo from your next tune ;-) Cheers, Benoît

6 years, 1 month

Berlin Linux Audio meeting @ c-base 2019-08-13

by Daniel Swärd

Hi all. As usual the second Tuesday of the month is upon us. I'll be in the mainhall from 20:00. See you there. Suggested discussion topic: Anyone going to Chaos Communication Camp? Should we do a LAU thing there? Cheers /Daniel

6 years, 1 month

Writing a driver for a device which clears the buffer on the start trigger

by Paul Pawlowski

Hello, I'm writing a driver for a device which clears the BAR DMA buffer if I send the Start IO command to it. I'm not sure how to workaround this issue. I have got the driver working to some extent by moving the Start IO command code to the open() callback instead of the trigger(SNDRV_PCM_TRIGGER_START) however that's obviously a hack and causes issues (the first ~0.1s of audio is lost). I also tried to memcpy() the memory to a temporary buffer in the SNDRV_PCM_TRIGGER_START trigger, however that turned out to be a performance bottleneck (it took about ~300ms to copy that memory back, which is ~the period size, probably related). I'm also aware that using some sort of a copy buffer could work, but that sounds like a performance waste as it's not needed after the playback is started. I tried to search for existing kernel drivers utilizing a similar mechanism (there's the SNDRV_PCM_INFO_DOUBLE flag after all), but could not find any results that made sense. Any help is appreciated. Thank you, Paul Pawlowski

6 years, 1 month

jack meterbridge 0.9.2 update / maintenance

by Stephan Bourgeois

Hi there, I have been tinkering with Steve Harris' meterbridge 0.9.2 for jack. cf. https://github.com/stephanb2/jack-meterbridge 1. Refactored global variables so that the code builds on Debian 9.2. 2. Improved (?) the dpm IEC scale and ballistics. 3. Changed the PPM ballistics to use Fons Adriaensen's JMeters algorithm. I do however have a deeper question: what is the point of jack meterbridge? Given that the broadcast and podcast industry has moved to EBU-R128 and Ebumeter offers EBU R-128 metering. JMeters offers "nostalgia" PPM and VU meters with correct ballistics, more options, better graphics. The only thing missing would be a 4x oversampling true peak meter. Should meterbridge be maintained or should another metering app de bundled with jack? Note that I am not a C engineer, my background is Java and Python. Please send code review comments and shout if you see anything horrific. Let me know your thoughts. Cheers, Stephan. -- Sent from: http://linux-audio.4202.n7.nabble.com/linux-audio-dev-f58952.html

6 years, 1 month

[ANN] Qtractor 0.9.9 - Summer'19 Release batch #3

by Rui Nuno Capela

Hello all, For the third time and hopefully the last in the current northern estival season comes the final 'batch-of-one': Qtractor 0.9.9 (summer'19) is out! These are the changes for this Summer'19 release: - Fixed editing and display of 'Pgm Change' events on the MIDI clip editor (aka. piano-roll). - Introducing tempo/beat-detection support on the Clip / Tempo Adjust... dialog (provided libaubio >= 0.4.1 is available); and now also featured with some rough visual clues ;). - Updated for the newer Qt5 development tools (>= 5.13). - Imply asking for a brand new filename (ie. Save As...) whenever the session file original sample-rate differs from the current audio device engine (ie. JACK). - Configure updated to check for qtchooser availability. - Fix MIDI through for LV2 plug-ins that have no MIDI output event/atom ports. Description: Qtractor [1] is an audio/MIDI multi-track sequencer application written in C++ with the Qt framework [2]. 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.org https://qtractor.sourceforge.io http://qtractor.sourceforge.net Project page: https://sourceforge.net/projects/qtractor Downloads: https://sourceforge.net/projects/qtractor/files - source tarball: https://download.sf.net/qtractor/qtractor-0.9.9.tar.gz - source package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.9-44.rncbc.suse.src.rpm - binary package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.9-44.rncbc.suse.x86_64.rpm - AppImage [7] packages: https://download.sf.net/qtractor/qtractor-0.9.9-14.x86_64.AppImage Git repos: https://git.code.sf.net/p/qtractor/code https://github.com/rncbc/qtractor.git https://gitlab.com/rncbc/qtractor.git https://bitbucket.org/rncbc/qtractor.git Wiki (help still wanted!): https://sourceforge.net/p/qtractor/wiki/ - static rendering: http://qtractor.org/doc http://qtractor.sourceforge.net/doc https://qtractor.sourceforge.io/doc - user manual & how-to's: https://download.sf.net/qtractor/qtractor-manual-and-howtos.epub https://download.sf.net/qtractor/qtractor-manual-and-howtos.pdf License: Qtractor [1] is free, open-source Linux Audio [5] software, distributed under the terms of the GNU General Public License (GPL [6]) version 2 or later. References: [1] Qtractor - An audio/MIDI multi-track sequencer http://qtractor.org https://qtractor.sourceforge.io http://qtractor.sourceforge.net [2] Qt framework, C++ class library and tools for cross-platform application and UI development https://qt.io/ [3] JACK Audio Connection Kit http://jackaudio.org [4] ALSA, Advanced Linux Sound Architecture https://www.alsa-project.org/ [5] Linux Audio consortium of libre software for audio-related work https://linuxaudio.org [6] GPL - GNU General Public License https://www.gnu.org/copyleft/gpl.html [7] AppImage, Linux apps that run anywhere https://appimage.org/ See also: https://www.rncbc.org/drupal/node/2017 Enjoy && Lots of fun. -- rncbc aka Rui Nuno Capela

6 years, 1 month

spectmorph-0.5.0

by Stefan Westerfeld

spectmorph-0.5.0 has been released. Overview of Changes in spectmorph-0.5.0: ---------------------------------------- * Support user defined instruments - graphical instrument editor - new WavSource operator * Make standard instrument set smaller (less download/disk usage) * Graphical ADSR editor * Added "SpectMorph User Manual" (online: html/pdf) * Use different colors for active/used/unused operators * LV2 now requires instance access feature * Add file dialog wrapper shell scripts to work with some ardour bundles * Integrate XML (pugixml) and ZIP (minizip) 3rd party code * Minor fixes and cleanups What is SpectMorph? ------------------- SpectMorph is a free software project which allows to analyze samples of musical instruments, and to combine them (morphing). It can be used to construct hybrid sounds, for instance a sound between a trumpet and a flute; or smooth transitions, for instance a sound that starts as a trumpet and then gradually changes to a flute. SpectMorph ships with many ready-to-use instruments which can be combined using morphing. SpectMorph is implemented in C++ and licensed under the GNU LGPL version 3 Integrating SpectMorph into your Work ------------------------------------- SpectMorph is currently available for Linux and Windows users. Here is a quick overview of how you can make music using SpectMorph. - VST Plugin, especially for proprietary solutions that don't support LV2. (Available on Linux and 64-bit Windows) - LV2 Plugin, for any sequencer that supports it. - JACK Client. Note that at this point, we may still change the way sound synthesis works, so newer versions of SpectMorph may sound (slightly) different than the current version. Links: ------ Website: http://www.spectmorph.org Download: http://www.spectmorph.org/downloads There are many audio demos on the website, which demonstrate morphing between instruments. -- Stefan Westerfeld, Hamburg/Germany, http://space.twc.de/~stefan

6 years, 1 month

[ANN] Vee One Suite 0.9.9 - Summer'19 Release batch #2

by Rui Nuno Capela

Summery cheers! The 'Vee One Suite' of so called 'old-school' software instruments are here released for the northern estival season: * synthv1 0.9.9 [1] * samplv1 0.9.9 [2] * drumkv1 0.9.9 [3] * padthv1 0.9.9 [4] All still available in dual form: - a pure stand-alone JACK client with JACK-session [5], NSM (Non Session management [6]) and both JACK MIDI and ALSA MIDI [7] input support; - a LV2 instrument plug-in [8]. The changes for this second batch of the Qstuff* Summer'19 release series are: - Randomization of current parameters and partials is now available through a new top-level push-button and the context-menu respectively (partials randomization is applicable to padthv1 [4] only). - Zero-crossing detection algorithm has been improved, most specially to mitigate transient clicks across offset and/or loop points (whether applicable to samplv1 [2] and drumkv1 [3] only). - Updated for the newer Qt5 development tools (>= 5.13). - Per instance custom tuning (micro-tonal) option has been added to the previously existing global settings (cf. Help > Configure... > Tuning > Global, Instance). - New DCF, LFO and DCA Enabled parameters (DCA disabling is applicable to samplv1 [2] and drumkv1 [3] only). - Configure updated to check for qtchooser availability. The 'Vee One Suite' are free, open-source Linux Audio [10] software, distributed under the terms of the GNU General Public License (GPL) [11] version 2 or later. **synthv1 - an old-school polyphonic synthesizer [1] ** synthv1 0.9.9 (summer'19) is out! synthv1 is an old-school all-digital 4-oscillator subtractive polyphonic synthesizer with stereo fx. LV2 URI: http://synthv1.sourceforge.net/lv2 website: https://synthv1.sourceforge.io http://synthv1.sourceforge.net project page: https://sourceforge.net/projects/synthv1 downloads: https://sourceforge.net/projects/synthv1/files - source tarball: https://download.sf.net/synthv1/synthv1-0.9.9.tar.gz - source package: https://download.sf.net/synthv1/synthv1-0.9.9-46.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): 7 https://download.sf.net/synthv1/synthv1-0.9.9-46.rncbc.suse.x86_84.rpm - AppImage [9] package (JACK stand-alone only): https://download.sf.net/synthv1/synthv1-0.9.9-13.x86_64.AppImage git repos: https://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 0.9.9 (summer'19) is out! samplv1 is an old-school polyphonic sampler synthesizer with stereo fx. LV2 URI: http://samplv1.sourceforge.net/lv2 website: https://samplv1.sourceforge.io http://samplv1.sourceforge.net project page: https://sourceforge.net/projects/samplv1 downloads: https://sourceforge.net/projects/samplv1/files - source tarball: https://download.sf.net/samplv1/samplv1-0.9.9.tar.gz - source package: https://download.sf.net/samplv1/samplv1-0.9.9-46.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): https://download.sf.net/samplv1/samplv1-0.9.9-46.rncbc.suse.x86_84.rpm - AppImage [9] package (JACK stand-alone only): https://download.sf.net/samplv1/samplv1-0.9.9-13.x86_64.AppImage git repos: https://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 0.9.9 (summer'19) is out! drumkv1 is an old-school drum-kit sampler synthesizer with stereo fx. LV2 URI: http://drumkv1.sourceforge.net/lv2 website: https://drumkv1.sourceforge.io http://drumkv1.sourceforge.net project page: https://sourceforge.net/projects/samplv1 downloads: https://sourceforge.net/projects/drumkv1/files - source tarball: https://download.sf.net/drumkv1/drumkv1-0.9.9.tar.gz - source package: https://download.sf.net/drumkv1/drumkv1-0.9.9-42.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): https://download.sf.net/drumkv1/drumkv1-0.9.9-42.rncbc.suse.x86_84.rpm - AppImage [9] package (JACK stand-alone only): https://download.sf.net/drumkv1/drumkv1-0.9.9-13.x86_64.AppImage git repos: https://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 0.9.9 (summer'19) is out! 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 website: http://padthv1.sourceforge.net https://padthv1.sourceforge.io project page: https://sourceforge.net/projects/padthv1 downloads: https://sourceforge.net/projects/padthv1/files - source tarball: https://download.sf.net/padthv1/padthv1-0.9.9.tar.gz - source package: https://download.sf.net/padthv1/padthv1-0.9.9-13.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): https://download.sf.net/padthv1/padthv1-0.9.9-13.rncbc.suse.x86_84.rpm - AppImage [9] package (JACK stand-alone only): https://download.sf.net/padthv1/padthv1-0.9.9-13.x86_64.AppImage git repos: https://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 References: [1] synthv1 - an old-school polyphonic synthesizer https://synthv1.sourceforge.io http://synthv1.sourceforge.net/ [2] samplv1 - an old-school polyphonic sampler https://samplv1.sourceforge.io http://samplv1.sourceforge.net/ [3] drumkv1 - an old-school drum-kit sampler https://drumkv1.sourceforge.io http://drumkv1.sourceforge.net/ [4] padthv1 - an old-school polyphonic additive synthesizer https://padthv1.sourceforge.io 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 https://www.alsa-project.org/ [8] LV2, Audio Plugin Standard, the extensible successor of LADSPA http://lv2plug.in/ [9] AppImage, Linux apps that run anywhere https://appimage.org/ [10] Linux Audio consortium of libre software for audio-related work https://linuxaudio.org [11] GNU General Public License https://www.gnu.org/copyleft/gpl.html See also: https://www.rncbc.org/drupal/node/2013 Enjoy && Take fun! -- rncbc aka. Rui Nuno Capela

6 years, 2 months

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Linux-audio-dev