Linux-audio-dev January 2023

linux-audio-dev@lists.linuxaudio.org

2 participants
7 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

1 year, 6 months

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, 7 months

Text editor with new views in separate windows (not tabs or split views)

by Will Godfrey

Up till now I used Kwrite, but in recent versions this now only supports split views and tabs, and no longer new views in a new window. Separate windows in my preferred style, and I find I can work much faster and more accurately that way. Does anyone know of a text editor that still does this? I've not been able to identify anything on the usual search engines, nor with Wikipedia :( -- Will J Godfrey {apparently now an 'elderly'} https://willgodfrey.bandcamp.com/ http://yoshimi.github.io Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

1 year, 9 months

[ANN] Qtractor 0.9.31 - A Winter'23 Release

by Rui Nuno Capela

Hello again, Qtractor 0.9.31 (winter'23) is out! Change-log: - Fixed a off-by-one rounding error on MIDI clip offset and lengths that were leaving some clips unlinked on load. - LXVST_PATH environment variable now accrues to VST_PATH for Linux-native VST2 plug-ins search path and not taking over in precedence anymore. - Fixed an old mistake on custom aliased CLAP and VST3 plugin paths. 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-0.9.31.tar.gz - source package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.31-74.1.rncbc.suse.src.rpm - binary package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.31-74.1.rncbc.suse.x86_64.rpm - AppImage [7] package: https://download.sf.net/qtractor/qtractor-0.9.31-74.1.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/2412 Cheers && Keep the fun! -- rncbc aka Rui Nuno Capela -- rncbc aka. Rui Nuno Capela rncbc(a)rncbc.org

1 year, 9 months

[ANN] Vee One Suite 0.9.29 - A Winter'23 Release

by Rui Nuno Capela

Hello 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 the (northern) [i]Winter'23[/i] season... All still 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 brief change-log applies for all in common: - Bumping copyright headers to the brand new year. 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 0.9.29 (winter'23) 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/synthv1-0.9.29.tar.gz - source package: https://download.sf.net/synthv1/synthv1-0.9.29-70.1.rncbc.suse.src.rpm - binary packages (openSUSE Tumbleweed): https://download.sf.net/synthv1/synthv1-jack-0.9.29-70.1.rncbc.suse.x86_84.… https://download.sf.net/synthv1/synthv1-lv2-0.9.29-70.1.rncbc.suse.x86_84.r… - AppImage [9] package (JACK stand-alone only): https://download.sf.net/synthv1/synthv1-jack-0.9.29-70.1.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 0.9.29 (winter'23) 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/samplv1-0.9.29.tar.gz - source package: https://download.sf.net/samplv1/samplv1-0.9.29-70.1.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): https://download.sf.net/samplv1/samplv1-jack-0.9.29-70.1.rncbc.suse.x86_84.… https://download.sf.net/samplv1/samplv1-lv2-0.9.29-70.1.rncbc.suse.x86_84.r… - AppImage [9] package (JACK stand-alone only): https://download.sf.net/samplv1/samplv1-jack-0.9.29-70.1.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 0.9.29 (winter'23) 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/drumkv1-0.9.29.tar.gz - source package: https://download.sf.net/drumkv1/drumkv1-0.9.29-70.1.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): https://download.sf.net/drumkv1/drumkv1-jack-0.9.29-70.1.rncbc.suse.x86_84.… https://download.sf.net/drumkv1/drumkv1-lv2-0.9.29-70.1.rncbc.suse.x86_84.r… - AppImage [9] package (JACK stand-alone only): https://download.sf.net/drumkv1/drumkv1-jack-0.9.29-70.1.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 0.9.29 (winter'23) 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/padthv1-0.9.29.tar.gz - source package: https://download.sf.net/padthv1/padthv1-0.9.29-70.1.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): https://download.sf.net/padthv1/padthv1-jack-0.9.29-70.1.rncbc.suse.x86_84.… https://download.sf.net/padthv1/padthv1-lv2-0.9.29-70.1.rncbc.suse.x86_84.r… - AppImage [9] package (JACK stand-alone only): https://download.sf.net/padthv1/padthv1-jack-0.9.29-70.1.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/2409 Cheers && Have (lot's of) fun! -- rncbc aka. Rui Nuno Capela

1 year, 9 months

[ANN] Vee One Suite 0.9.29 - A Winter'23 Release

by Rui Nuno Capela

1 year, 9 months

GxPlugins.lv2 v1.0 released

by Hermann Meyer

I'm proud to announce the release of GxPlugins.lv2 v1.0 GxPlugins is a extra set of effect processing LV2 plugins from the Guitarix project. Project page with more information is here: https://github.com/brummer10/GxPlugins.lv2 New in this release: Support for Windows (64bit). Implemented by Thorsten Maerz. Release page is here: https://github.com/brummer10/GxPlugins.lv2/releases/tag/v1.0 we provide the source tar ball, a debian/ubuntu package and a win64 binary package. We hope the plugs will be useful, hermann

1 year, 10 months

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Linux-audio-dev January 2023