Linux-audio-dev March 2023

linux-audio-dev@lists.linuxaudio.org

7 participants
11 discussions

stereospread.lv2 - Stereo spreading plugin (conjugate random phase all-pass filter pair)

by Florian Paul Schmidt

Hi, I wrote a small plugin for spreading mono content to stereo and I would like to receive some feedback on it from people more knowledgable in DSP matters than me. It has one nice property: It spreads the signal over the spectrum by way of a conjugate pair of random phase all-pass filters, and since it's a conjugate pair it sums back to unity when down-mixing to mono. So, no ugly comb filter effects like when downmixing a Haas-expanded signal. https://github.com/fps/stereospread.lv2 The page has an example sound.. How it works: It's actually rather simple: 1. create a vector of random phases (matlab notation): filter_length = 1000; spread = pi; hfft1 = exp(-1i*(spread*rand(filter_length,1) - spread/2)); And for the second filter just take the complex conjugate: hfft2 = conj(hfft1); This ensures that what is a phase theta in the first filter becomes a phase of -theta in the second filter, and summed that just gives a phase of 0. 2. Then assemble the coefficients such that it corresponds to a fft of a real signal and do the inverse fft (possibly I have a small error here which i needed to fix with the 'symmetric' flag in matlab): f1 = ifft([1; hfft1; conj(hfft1((end-1):-1:1))], 'symmetric'); f2 = ifft([1; hfft2; conj(hfft2((end-1):-1:1))], 'symmetric'); 3. The two IRs f1 and f2 implement the pair of filters and can be applied via convolution (which the above plugin does). It seems to be possible with little ill effect to reduce the length of the filter down to a size of 50 samples or so by just cutting it off before the convolution. What do you think? Kind regards, FPS -- https://dfdx.eu

2 years

I'm being stalked, please be weary

by Jeanette C.

Hey hey, I am being stalked and the stalker has already contacted people I am connected with. Please, if anyone contacts you with any request, be weary. It's a plain name gmail address. Thank you and sorry to bother you! Best wishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * Audiobombs: https://www.audiobombs.com/users/jeanette_c * GitHub: https://github.com/jeanette-c Do you even know what I like Just what I'm living for, What I adore <3 (Britney Spears)

2 years, 1 month

Join the Open Source Music and Audio Production Community at the 2023 Sonoj Convention (October 7th and 8th)

by Sonoj Convention

Dear Sir or Madam, ( Summary: Sonoj Convention is 2023-10-07 in Cologne, Germany. Register now at https://sonoj.org ) Are you a musician, sound designer, or just passionate about open source technology and music? If so, we're excited to invite you to the 2023 Sonoj Convention, which will be held on October 7th and 8th at our usual location in Cologne, Germany. After the disappointment of having to cancel our past three events due to the pandemic, we are thrilled to finally welcome you back to our community. Admission is free, but donations are welcome to help us cover the costs. This year's convention is shaping up to be even more special than before, with exciting networking opportunities, informative "Lecdems" (lecture-demonstrations), hands-on workshops, live performances, and more. Here are some highlights of what you can expect at the event: * Networking Opportunities: Connect with like-minded individuals, exchange ideas, and make lasting connections with others who share your passion for open source music and audio production. Our community is welcoming and inclusive, with something for everyone. * Informative Talks and Demonstrations: Discover new ideas and approaches in our thought-provoking presentations and lecdems, delivered by knowledgeable speakers who are experts in their fields. * Interactive Workshops: Learn and experiment with the latest open source music and audio production tools and techniques, guided by our friendly and helpful instructors. * Live Performances: Experience the diverse and captivating sounds of our talented and dynamic performers, showcasing their usage of open source technology. We will be providing a supply of simple food for free so you can enjoy the event with a full stomach. Of course there are plenty of opportunities to purchase food in the surrounding area as well. Don't miss this opportunity to connect with the vibrant open source music and audio production community. Register now on our website https://sonoj.org for the 2023 Sonoj Convention (or by replying to this e-mail) and we look forward to seeing you there! Best regards, Nils Cologne, Germany

2 years, 1 month

[ANN] Qtractor 0.9.33 - An Early-Spring'23 Hotfix Release

by Rui Nuno Capela

Yet again, Qtractor 0.9.33 (early-spring'23 hotfix) is out! Change-log: - Fixed MIDI recording delay and recorded clip lengths when metronome Count-in is in effect for recording. 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: https://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-0.9.33.tar.gz - source package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.33-76.1.rncbc.suse.src.rpm - binary package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.33-76.1.rncbc.suse.x86_64.rpm - AppImage [7] package: https://download.sf.net/qtractor/qtractor-0.9.33-76.1.x86_64.AppImage - Flatpak [8] package (thanks Hubert Figuière): https://flathub.org/apps/details/org.rncbc.qtractor Git repos: https://git.code.sf.net/p/qtractor/code https://github.com/rncbc/qtractor.git https://gitlab.com/rncbc/qtractor.git https://codeberg.org/rncbc/qtractor.git Wiki (outdated; help wanted!): https://sourceforge.net/p/qtractor/wiki/ - static rendering: https://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 https://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 https://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/ [8] Flatpak, next-generation technology for building and distributing desktop applications on Linux https://flatpak.org/ [9] CLAP, CLever Audio Plugin https://github.com/free-audio/clap See also: https://www.rncbc.org/drupal/node/2427 Keep having fun! -- rncbc aka Rui Nuno Capela

2 years, 1 month

[ANN] Qtractor 0.9.32 - An Early-Spring'23 Release batch #3

by Rui Nuno Capela

Hi again, Qtractor 0.9.32 (early-spring'23) released! Change-log: - Downgraded JACK timebase BBT information to nominal PPQN resolution (aka. ticks-per-beat). - Make sure all previously saved connections to identical ALSA MIDI hardware devices are now discriminated and properly restored, even though the target devices have the very same name. - Fix drag'n'drop in drum mode MIDI clip editor. - Quick hack to get latency compensation when recording. - Introducing count-in to audio and MIDI metronomes: View/Options.../Audio|MIDI/Metronome/Count-in; Transport/Count-in. - Corrected MIDI metronome bar/beat note durations. - Give an early reponse upon opening any NSM session. 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: https://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-0.9.32.tar.gz - source package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.32-75.1.rncbc.suse.src.rpm - binary package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.32-75.1.rncbc.suse.x86_64.rpm - AppImage [7] package: https://download.sf.net/qtractor/qtractor-0.9.32-75.1.x86_64.AppImage - Flatpak [8] package (thanks Hubert Figuière): https://flathub.org/apps/details/org.rncbc.qtractor Git repos: https://git.code.sf.net/p/qtractor/code https://github.com/rncbc/qtractor.git https://gitlab.com/rncbc/qtractor.git https://codeberg.org/rncbc/qtractor.git Wiki (outdated; help wanted!): https://sourceforge.net/p/qtractor/wiki/ - static rendering: https://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 https://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 https://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/ [8] Flatpak, next-generation technology for building and distributing desktop applications on Linux https://flatpak.org/ [9] CLAP, CLever Audio Plugin https://github.com/free-audio/clap See also: https://www.rncbc.org/drupal/node/2426 Cheers && Share the fun! -- rncbc aka Rui Nuno Capela

2 years, 1 month

[ANN] Vee One Suite 0.9.30 - An Early-Spring'23 Release batch #2

by Rui Nuno Capela

Hi there, The 'Vee One Suite' of 'old-school' software instruments, * synthv1 [1] as a polyphonic subtractive synthesizer; * samplv1 [2] a polyphonic sampler synthesizer; * drumkv1 [3] as yet another drum-kit sampler; * padthv1 [4] a polyphonic additive synthesizer. Are here released for this (northern) [i]Early-Spring'23[/i] season... As always, all being delivered 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]. A common change-log follows: - Restrict to existing named presets when adding new or editing programs; load and restore presets directly when previewing programs (cf. Configure... > Programs). - NSM open and save operation failures are now replied with an error status (was always OK before). - JACK client watchdog introduced for automatic reactivation and resilience (standalone only). - NSM announcement reply/error messages now relegated to debug builds only. 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 0.9.30 (early-spring'23) released! 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/synthv1-0.9.30.tar.gz - source package: https://download.sf.net/synthv1/synthv1-0.9.30-71.1.rncbc.suse.src.rpm - binary packages (openSUSE Tumbleweed): https://download.sf.net/synthv1/synthv1-jack-0.9.30-71.1.rncbc.suse.x86_84.… https://download.sf.net/synthv1/synthv1-lv2-0.9.30-71.1.rncbc.suse.x86_84.r… - AppImage [9] package (JACK stand-alone only): https://download.sf.net/synthv1/synthv1-jack-0.9.30-71.1.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://codeberg.org/rncbc/synthv1.git **samplv1 - an old-school polyphonic sampler [2]** samplv1 0.9.30 (early-spring'23) released! 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/samplv1-0.9.30.tar.gz - source package: https://download.sf.net/samplv1/samplv1-0.9.30-71.1.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): https://download.sf.net/samplv1/samplv1-jack-0.9.30-71.1.rncbc.suse.x86_84.… https://download.sf.net/samplv1/samplv1-lv2-0.9.30-71.1.rncbc.suse.x86_84.r… - AppImage [9] package (JACK stand-alone only): https://download.sf.net/samplv1/samplv1-jack-0.9.30-71.1.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://codeberg.org/rncbc/samplv1.git **drumkv1 - an old-school drum-kit sampler [3]** drumkv1 0.9.30 (early-spring'23) released! 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/drumkv1-0.9.30.tar.gz - source package: https://download.sf.net/drumkv1/drumkv1-0.9.30-71.1.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): https://download.sf.net/drumkv1/drumkv1-jack-0.9.30-71.1.rncbc.suse.x86_84.… https://download.sf.net/drumkv1/drumkv1-lv2-0.9.30-71.1.rncbc.suse.x86_84.r… - AppImage [9] package (JACK stand-alone only): https://download.sf.net/drumkv1/drumkv1-jack-0.9.30-71.1.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://codeberg.org/rncbc/drumkv1.git **padthv1 - an old-school polyphonic additive synthesizer [4]** padthv1 0.9.30 (early-spring'23) released! 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/padthv1-0.9.30.tar.gz - source package: https://download.sf.net/padthv1/padthv1-0.9.30-71.1.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): https://download.sf.net/padthv1/padthv1-jack-0.9.30-71.1.rncbc.suse.x86_84.… https://download.sf.net/padthv1/padthv1-lv2-0.9.30-71.1.rncbc.suse.x86_84.r… - AppImage [9] package (JACK stand-alone only): https://download.sf.net/padthv1/padthv1-jack-0.9.30-71.1.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://codeberg.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 https://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 https://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/2425 Have some fun! -- rncbc aka. Rui Nuno Capela

2 years, 1 month

[ANN] The QStuff* Early-Spring'23 Release batch #1

by Rui Nuno Capela

Howdy! And here goes the first batch of the 'QStuff*': QjackCtl [1], Qsynth [2], Qsampler [3], QXGEdit [4], QmidiCtl [5] and QmidiNet [6], are now released for this Early-Spring'23 season. Enjoy. ** QjackCtl - JACK Audio Connection Kit Qt GUI Interface [1] ** QjackCtl 0.9.10 (early-spring'23) is out! QjackCtl is an aged yet modern, not so 'simple' anymore, Qt [7] application to control the JACK [8] sound server, for the Linux Audio [12] infrastructure. Change-log: - Setup: revert to previous settings when dismissing the dialog. - Graph: Attempt to make port labels as short as possible. - Graph: introducing touch pinch-gesture for zooming. Website: https://qjackctl.sourceforge.io http://qjackctl.sourceforge.net Project page: https://sourceforge.net/projects/qjackctl Downloads: https://sourceforge.net/projects/qjackctl/files - source tarball: https://download.sf.net/qjackctl/qjackctl-0.9.10.tar.gz - source package: https://download.sf.net/qjackctl/qjackctl-0.9.10-54.1.rncbc.suse.src.rpm - binary packages: https://download.sf.net/qjackctl/qjackctl-0.9.10-54.1.rncbc.suse.x86_64.rpm - AppImage [20] package: https://download.sf.net/qjackctl/qjackctl-0.9.10-54.1.x86_64.AppImage Git repos: https://git.code.sf.net/p/qjackctl/code https://github.com/rncbc/qjackctl.git https://gitlab.com/rncbc/qjackctl.git https://codeberg.com/rncbc/qjackctl.git ** Qsynth - A FluidSynth Qt GUI Interface [2] ** Qsynth 0.9.10 (early-spring'23) is out! Qsynth is a FluidSynth [10] GUI front-end application written in C++ around the Qt framework [7] using Qt Designer. Change-log: - Bumping copyright headers to the brand new year. Website: https://qsynth.sourceforge.io http://qsynth.sourceforge.net Project page: https://sourceforge.net/projects/qsynth Downloads: https://sourceforge.net/projects/qsynth/files - source tarball: https://download.sf.net/qsynth/qsynth-0.9.10.tar.gz - source package: https://download.sf.net/qsynth/qsynth-0.9.10-54.1.rncbc.suse.src.rpm - binary packages: https://download.sf.net/qsynth/qsynth-0.9.10-54.1.rncbc.suse.x86_64.rpm - AppImage [20] package: https://download.sf.net/qsynth/qsynth-0.9.10-54.1.x86_64.AppImage - Flatpak [21] package (thanks to Pedro Lopez-Cabanillas): https://flathub.org/apps/details/org.rncbc.qsynth Git repos: https://git.code.sf.net/p/qsynth/code https://github.com/rncbc/qsynth.git https://gitlab.com/rncbc/qsynth.git https://codeberg.com/rncbc/qsynth.git ** Qsampler - A LinuxSampler Qt GUI Interface [3] ** Qsampler 0.9.9 (early-spring'23) is out! Qsampler is a LinuxSampler [11] GUI front-end application written in C++ around the Qt framework [7] using Qt Designer. Change-log: - Bumping copyright headers to the brand new year. Website: https://qsampler.sourceforge.io http://qsampler.sourceforge.net Project page: https://sourceforge.net/projects/qsampler Downloads: https://sourceforge.net/projects/qsampler/files - source tarballs: https://download.sf.net/qsampler/qsampler-0.9.9.tar.gz https://download.sf.net/qsampler/liblscp-0.9.9.tar.gz - source packages: https://download.sf.net/qsampler/qsampler-0.9.9-53.1.rncbc.suse.src.rpm https://download.sf.net/qsampler/liblscp-0.9.9-53.1.rncbc.suse.src.rpm - binary packages: https://download.sf.net/qsampler/qsampler-0.9.9-53.1.rncbc.suse.x86_64.rpm https://download.sf.net/qsampler/liblscp6-0.9.9-53.1.rncbc.suse.x86_64.rpm https://download.sf.net/qsampler/liblscp-devel-0.9.9-53.1.rncbc.suse.x86_64… - AppImage [20] package: https://download.sf.net/qsampler/qsampler-0.9.9-53.1.x86_64.AppImage Git repos: https://git.code.sf.net/p/qsampler/code https://github.com/rncbc/qsampler.git https://gitlab.com/rncbc/qsampler.git https://codeberg.com/rncbc/qsampler.git https://git.code.sf.net/p/qsampler/liblscp https://github.com/rncbc/liblscp.git https://gitlab.com/rncbc/liblscp.git https://codeberg.com/rncbc/liblscp.git ** QXGEdit - A Qt XG Editor [4] ** QXGEdit 0.9.9 (early-spring'23) is out! QXGEdit is a live XG instrument editor, specialized on editing MIDI System Exclusive files (.syx) for the Yamaha DB50XG [14] and thus probably a baseline for many other XG devices. Change-log: - Drum Setup is being made possible for any drum-kit, with some provided default values, not just for the default Standard Kit anymore. Website: https://qxgedit.sourceforge.io http://qxgedit.sourceforge.net Project page: https://sourceforge.net/projects/qxgedit Downloads: https://sourceforge.net/projects/qxgedit/files - source tarball: https://download.sf.net/qxgedit/qxgedit-0.9.9.tar.gz - source package: https://download.sf.net/qxgedit/qxgedit-0.9.9-53.1.rncbc.suse.src.rpm - binary packages: https://download.sf.net/qxgedit/qxgedit-0.9.9-53.1.rncbc.suse.x86_64.rpm - AppImage [20] package: https://download.sf.net/qxgedit/qxgedit-0.9.9-53.1.x86_64.AppImage Git repos: https://git.code.sf.net/p/qxgedit/code https://github.com/rncbc/qxgedit.git https://gitlab.com/rncbc/qxgedit.git https://codeberg.com/rncbc/qxgedit.git ** QmidiCtl - A MIDI Remote Controller via UDP/IP Multicast [5] ** QmidiCtl 0.9.9 (early-spring'23) is out! QmidiCtl [5] is a MIDI remote controller application that sends MIDI data over the network, using UDP/IP multicast. Inspired by multimidicast [15] and designed to be compatible with ipMIDI [15] for Windows. QmidiCtl [5] was long ago designed for the Maemo [17] enabled handheld devices, namely the late Nokia N900 [18] and promoted to the Maemo Package [18] repositories. Nevertheless, QmidiCtl [5] may still be found effective as a regular desktop application and recently as an Android application as well. Change-log: - Bumping copyright headers to the brand new year. Website: https://qmidictl.sourceforge.io http://qmidictl.sourceforge.net Project page: https://sourceforge.net/projects/qmidictl Downloads: https://sourceforge.net/projects/qmidictl/files - source tarball: https://download.sf.net/qmidictl/qmidictl-0.9.9.tar.gz - source package: https://download.sf.net/qmidictl/qmidictl-0.9.9-53.1.rncbc.suse.src.rpm - binary packages: https://download.sf.net/qmidictl/qmidictl-0.9.9-53.1.rncbc.suse.x86_64.rpm - AppImage [20] package: https://download.sf.net/qmidictl/qmidictl-0.9.9-53.1.x86_64.AppImage - Android packages: https://download.sf.net/qmidictl/qmidictl-0.9.9-53.1.arm64-v8a.apk https://download.sf.net/qmidictl/qmidictl-0.9.9-53.1.x86_64.apk https://play.google.com/store/apps/details?id=org.rncbc.qmidictl Git repos: https://git.code.sf.net/p/qmidictl/code https://github.com/rncbc/qmidictl.git https://gitlab.com/rncbc/qmidictl.git https://codeberg.com/rncbc/qmidictl.git ** QmidiNet - A MIDI Network Gateway via UDP/IP Multicast [6] ** QmidiNet 0.9.9 (early-spring'23) is out! QmidiNet is a MIDI network gateway application that sends and receives MIDI data (ALSA-MIDI [9] and JACK-MIDI [8]) over the network, using UDP/IP multicast. Inspired by multimidicast [15] and designed to be compatible with ipMIDI [16] for Windows. Change-log: - Bumping copyright headers to the brand new year. Website: https://qmidinet.sourceforge.io http://qmidinet.sourceforge.net Project page: https://sourceforge.net/projects/qmidinet Downloads: https://sourceforge.net/projects/qmidinet/files - source tarball: https://download.sf.net/qmidinet/qmidinet-0.9.9.tar.gz - source package: https://download.sf.net/qmidinet/qmidinet-0.9.9-53.1.rncbc.suse.src.rpm - binary packages: https://download.sf.net/qmidinet/qmidinet-0.9.9-53.1.rncbc.suse.x86_64.rpm - AppImage [20] package: https://download.sf.net/qmidinet/qmidinet-0.9.9-53.1.x86_64.AppImage Git repos: https://git.code.sf.net/p/qmidinet/code https://github.com/rncbc/qmidinet.git https://gitlab.com/rncbc/qmidinet.git https://codeberg.com/rncbc/qmidinet.git -- License: All of the Qstuff* are free, open-source Linux Audio [11] software, distributed under the terms of the GNU General Public License (GPL) version 2 or later [12]. References: [1] QjackCtl - A JACK Audio Connection Kit Qt GUI Interface https://qjackctl.sourceforge.io [2] Qsynth - A fluidsynth Qt GUI Interface https://qsynth.sourceforge.io [3] Qsampler - A LinuxSampler Qt GUI Interface https://qsampler.sourceforge.io [4] QXGEdit - A Qt XG Editor https://qxgedit.sourceforge.io [5] QmidiCtl - A MIDI Remote Controller via UDP/IP Multicast https://qmidictl.sourceforge.io [6] QmidiNet - A MIDI Network Gateway via UDP/IP Multicast https://qmidinet.sourceforge.io [7] Qt framework, C++ class library and tools for cross-platform application and UI development https://qt.io/ [8] JACK Audio Connection Kit https://jackaudio.org [9] ALSA, Advanced Linux Sound Architecture https://www.alsa-project.org/ [10] FluidSynth - A SoundFont Synthesizer A real-time software synthesizer based on SoundFont 2 specifications https://www.fluidsynth.org [11] LinuxSampler - The Linux Sampler Project A modular, streaming capable, realtime audio sampler https://www.linuxsampler.org [12] Linux Audio consortium of libre software for audio-related work https://linuxaudio.org [13] GPL - GNU General Public License https://www.gnu.org/copyleft/gpl.html [14] Yamaha DB50XG (https://web.archive.org/web/20150607065739/) http://www.soundonsound.com/sos/1996_articles/may96/yamahadb50xg.html [15] multimidicast - sends and receives MIDI from ALSA sequencers over network https://llg.cubic.org/tools/multimidicast [16] ipMIDI - MIDI over Ethernet ports - send MIDI over your LAN https://nerds.de [17] Maemo.org - Home of the Maemo community https://www.maemo.org [18] Maemo.org Wiki - Nokia N900 https://wiki.maemo.org/Nokia_N900 [19] Maemo.org - Downloads: QmidiCtl https://maemo.org/downloads/product/Maemo5/qmidictl [20] AppImage, Linux apps that run anywhere https://appimage.org/ [21] Flatpak, next-generation technology for building and distributing desktop applications on Linux https://flatpak.org/ See also: https://www.rncbc.org/drupal/node/2424 See you all next time! -- rncbc aka Rui Nuno Capela

2 years, 2 months

Status of Pipewire

by Fons Adriaensen

Hello all, I've been contemplating trying out Pipewire as a replacement for Jack. What is holding me back is a what seems to be a serious lack of information. I'm not prepared to spend a lot of time and risk breaking a perfectly working system just to find out that it was a bad idea from the start. So I have a lot of questions which maybe some of you reading this can answer. Thanks in advance for all useful information. A first thing to consider is that I actually *like* the separation of the 'desktop' and 'pro audio' worlds that using Jack provides. I don't want the former to interfere (or just be able to do so) with the latter. Even so, it may be useful in some cases to route e.g. browser audio or a video conference to the Jack world. So the ideal solution for me would be the have Pipewire as a Jack client. So first question: Q1. Is that still possible ? If not, why not ? If the answer is no, then all of the following become relevant. Q2. Does Pipewire as a Jack replacement work, in a reliable way [1], in real-life conditions, with tens of clients, each maybe having up to a hundred ports ? Q3. What overhead (memory, CPU) is incurred for such large systems, compared to plain old Jack ? A key feature of Jack is that all clients share a common idea of what a 'period' is, including its timing. In particular the information provided by jack_get_cycle_times(), which is basically the state of the DLL and identical for all clients in any particular period. Now if Pipewire allows (non-Jack) clients with arbitrary periods (and even sample rates) Q4. Where is the DLL and what does it lock to when Pipewire is emulating Jack ? Q5. Do all Jack clients see the same (and correct) info regarding the state of the DLL in all cases ? The only way I can see this being OK would be that the Jack emulation is not just a collection of Pipewire clients which happen to have compatible parameters, but actually a dedicated subsystem that operates almost independently of what the rest of Pipewire is up to. Which in turn means that having Pipewire as a Jack client would be the simpler (and hence preferred) solution. [1] which means I won't fall flat on my face in front of a customer or a concert audience because of some software hickup. Ciao, -- FA

2 years, 2 months

Happy birthday, LAC! 20 years, and..going? Strong?

by Frank Neumann

Hi all, not posting to any of LA* mailing lists often in the last years, but today I thought I should make an exception to point out that it's now exactly 20 years ago that the first Linux Audio Conference or "LAC" for short (then still called "Linux Audio Developer's Meeting") took place at the ZKM in Karlsruhe, Germany. https://lists.linuxaudio.org/hyperkitty/list/linux-audio-dev@lists.linuxaud… Wow, 20 years come and gone so quickly! It's great to see a couple of "early adopters" are still around today here, and many new names have entered the scene in the meantime and left/leave a lasting footprint in it. As a quick "trip down memory lane", here's a short list of things that happened back then: - Takashi Iwai dove into the innards of an ALSA driver - Fernando Lopez-Lezcano introduced the PlanetCCRMA distribution, based on Fedora - Steve Harris explained the concept of a Bode frequency shifter as a LADSPA plugin - Paul Davis held the keynote, AND spoke about JACK, AND shared his experience of writing a DAW that is at the forefront of free, open-source and cross-platform DAWs today. - Dave Philipps looked at the historic development of Linux audio, from OSS to ALSA and beyond - Jörn Nettingsmeier managed to get the audio part of the presentations both recorded AND live-streamed at a time when "streaming" was still a term unknown to most of us. - The term "Linux Sound Night" already existed, but was..perhaps not as musical yet as you might have expected :-). - And, we also learned that schedules are not easy to keep - I believe after the first day we ran some >2 hours late, and people begin to STARVE. - Posing in front of the ZKM "Kubus": https://linuxaudio.de/LAC2003_Posse.jpg For some more memories, see also http://lac.linuxaudio.org/2003/zkm/ Of course, on the downside it has to be noted that Corona has impacted us too - after an almost perfect track record of conferences or mini-conferences every year, 2021 and 2022 didn't see any event happening. There is a certain risk now that it won't recover, but that's in our hands to change (sidenote: I have talked to my contacts at ZKM here in Karlsruhe in January, but they are unable to finance and/or organize an event of this size at the moment - certainly somewhat influenced by current economics, but I am hearing ZKM has actually reduced their headcount quite a bit, and after the recent passing of its artistic-scientific chairman, Peter Weibel, it will have to be seen how his successor, Alistair Hudson, will steer it into the future). Whatever LAC's future will be, free and open-source audio software is certainly flourishing, and will continue to do so. It just would be soo nice to enjoy the results together with real, tangible people :-\. If anyone sees an option for hosting a future LAC, lac-team(a)lists.linuxaudio.org is willing to listen to proposals you might have (or just discuss it right here). Well, the heck - there is no steering committee or anything in place, so I guess the first one brave enough to say "I think we can do it" will get the job :-). I am forever grateful to all the folks who have enriched and continue to enrich our open-source audio life by writing or presenting software, creating documentation and tutorials, hosting (AND attending) conferences like the LAC, and whatever else helps to keep the penguin dancing! Greetings, Frank

2 years, 2 months

[semi-OT} c++20 concepts and syntax

by Jeanette C.

Hey hey, figuring out the syntax for c++20 concepts I run into challenges. With a two parameter template concept like swappable_with or convertible_to is it always necessary to use a requires statement like this: template<typename T> requires std::convertible_to<T,int> void f(T t) ... ... With single parameter concepts like integral a syntax like this will work: template<std::integral T> void f(T t)... Also with single parameter concepts a statement like this should work: std::integral auto my_variable; Will that work with a two parameter concept like the above convertible_to? I haven't seen/found a syntax which does it. Any help is appreciated, definitely including a good read that WILL demonstrate or demystify these things. Best wishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * Audiobombs: https://www.audiobombs.com/users/jeanette_c * GitHub: https://github.com/jeanette-c Don't care about money It doesn't give me half the thrill <3 (Britney Spears)

2 years, 2 months

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Linux-audio-dev March 2023