Linux-audio-dev

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7404 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

11 months, 3 weeks

Help with Alsa lib

by ollie razdow

I'm a bit of a noob to linux audio programming, but I'm stuck with alsa lib and wondering if someone could help. When I use the function snd_dtl_open I get the error: Cannot open shared library libasound_module_conf_pulse.so (/usr/lib/alsa-lib/libasound_module_conf_pulse.so The library exists in /usr/lib/x86_64-linux-gnu/alsa-lib/l, but not /usr/lib/alsa-lib which doesn't exist. I suppose I could create a symlinked folder, but I'm wondering why alsa looks in that directory and what I can do get it working correctly? Thanks for any advice.

12 months

liquidsfz-0.3.2

by Stefan Westerfeld

liquidsfz-0.3.2 has been released The main goal of liquidsfz is to provide an SFZ sampler implementation library that is easy to integrate into other projects. A standalone jack client and a LV2 plugin is also available. liquidsfz is implemented in C++ and licensed under MPL-2.0. The release tarball can be downloaded here: https://github.com/swesterfeld/liquidsfz#releases Overview of Changes in liquidsfz-0.3.2: * Fix crashes triggered by Carla while saving without path * Allow multiple overlapping notes during sustain (#38) * Provide cross compiled LV2 plugin for Windows * Use LV2_STATE__freePath if available (fixes LV2 on windows) * Fixes for building on macOS and Windows * Improve tests and CI checks -- Stefan Westerfeld, http://space.twc.de/~stefan

1 year

snd-firewire-ctl-services 0.1.0 released

by Takashi Sakamoto

Hi all, This is a short announcement about a new release of snd-firewire-ctl-services project. After development for mostly three years[1], version 0.1.0 is released today. If you have FireWire audio device and interests in ALSA support, the release would be worth to check out. * https://github.com/alsa-project/snd-firewire-ctl-services/releases/tag/snd-… The project provides user space service programs to operate digital signal processing function in devices supported by ALSA firewire stack. If using such device, you can configure DSP functions such as the volumes of device. For some device, effects such as dynamics and equalizers are also configurable. Available devices are listed in README.rst of the project. The service programs work as 'message broaker'. ALSA control applications are available for end-user interface to communicate to the service programs[2]. The device connected to IEEE 1394 bus is the peer. The service programs receives messages from both ends, then translates and convert the messages to send to the opposite end. Against your expectation, the project provides neither GUI programs nor end-user interfaces. I know that the user experience is heavily on look-and-feel on the GUI programs, while it is out of the aim of project. I daily use quashctl in QasTools[3] and it is pretty good to me for such ALSA control application. If encountering any issue, please file it to github repository[4]. README should be helpful to new users. Thanks for your support and long patience to ALSA firewire stack. [1] https://lists.linuxaudio.org/hyperkitty/list/linux-audio-dev@lists.linuxaud… [2] For TASCAM FireWire series, ALSA sequencer application is such end as well to operate control surface. [3] https://gitlab.com/sebholt/qastools [4] https://github.com/alsa-project/snd-firewire-ctl-services Regards Takashi Sakamoto

1 year

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)

1 year

[LAA] New LV2 plugin: B.Silent

by Sven Jaehnichen

Hi, worried about the daily life noise level? But you only want a bit - silence? Then B.Silent is the virtual instrument to make your dreams come true. B.Silent is a unique MIDI instrument to produce silence in highest quality. Choose between 8 hand-selected types of silence provided as built-in presets to play silence in a never heard cleanliness. No background noise, no distortion, no glitches, only pure silence. Github: https://github.com/sjaehn/BSilent Video: https://www.youtube.com/watch?v=6-8g2qBZhSI Enjoy the silence! Released April 1, 2023 Sven

1 year, 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

1 year, 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

1 year, 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

1 year, 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

1 year, 1 month

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Linux-audio-dev