Linux-audio-user November 2024

linux-audio-user@lists.linuxaudio.org

7 participants
7 discussions

Pipe organs effect the sound of their halls simply by existing

by David W. Jones

<https://phys.org/news/2024-11-pipe-auto-tune-effect-largest.html> I still don't have a house large enough for a pipe organ. ☹️ --- David W. Jones gnome(a)hawaii.rr.com exploring the landscape of god http://dancingtreefrog.com Sent from my Android device with F/LOSS K-9 Mail.

3 days, 22 hours

Pipewire hard disk usage (presumably)

by Holger Dehnhardt

After the second move this year, I've finally started to set up my home studio properly again. (Ubuntu 24.04.1 LTS, Mixbus, RME ADI-2 Pro for monitoring, Focusrite Scarlett 18i20 2nd generation for integrating analog hardware) Since I've also updated Ubuntu, I've switched my workstation to Pipewire, as I've had quite good experiences with it on my laptop and running several audio interfaces in parallel is quite problematic. My first attempt with a smaller project (17 audio tracks) ran without any problems. My second attempt with a medium-sized project (~30 audio tracks), however, is driving me to despair. I have a DSP load of 50-60%, no buffer underruns but constant stuttering and occasional beeping. The log says the following Nov 12 22:37:13 muse pipewire[2048]: spa.alsa: hw:4c: snd_pcm_mmap_commit error 1022 514 1022: Data transfer interrupted (broken pipe) Nov 12 22:37:24 muse pipewire[2048]: spa.alsa: hw:4c: follower delay:873 target:1536 thr:1024 resample:1, resync (2 suppressed) It is interesting that when I start the safe mode in Mixbus, i.e. all effects are switched off, I have a DSP load of 10 percent and the stuttering and beeping is just as present. I don't have any analog hardware connected at this stage, so I read all tracks directly from disk and send them stereo to the RME interface. I didn't have these problems under jack2, but then the RME was also connected to the Scarlett via TOSLink, so there was only one interface visible to the system. I therefore suspect that it is a problem with the hard disk usage, as I can't think of any other reason. Unfortunately I have not found a way to optimize hard disk access and I don't even know if this is done directly by Pipewire or if one of the usual libraries is used for this. Have you seen this phenomenon before or do you have any ideas what else I can try? Thanks for any suggestions! Holger -- Holger Dehnhardt holger(a)dehnhardt.org https://www.dehnhardt.org

1 week, 4 days

Realtime-Kernel patch merged to mainline kernel after 20 years...

by Tobias Küchel

Cheers to Ingo Molnar! I am not sure how many users are interested in such news, since there might be still a linux-audio-dev community that I am not part of anymore. Nevertheless, it amuses me that basically half my life ago, I struggled and tested and read tons of stuff, invested a lot of time to get some nice audio stuff going on linux and some rather crappy hardware... and now, 20 years later, the foundation to all of it - a real-time kernel - did not disappear but was developed and maintained until the eagle has landed. Again, cheers to Ingo and all that contributed! Yours, Tobias.

1 week, 4 days

Re: A web-based sound maker

by Mario Lang

"David W. Jones" <gnome(a)hawaii.rr.com> writes: > https://draw.audio/ Also saw that on HN today. In the comments, there was another fun web audio link: https://roland50.studio/ -- CYa, ⡍⠁⠗⠊⠕

1 week, 5 days

Bach, Mozart or jazz: Scientists provide a quantitative measure of variability in music pieces

by David W. Jones

<https://phys.org/news/2024-11-bach-mozart-jazz-scientists-quantitative.html> --- David W. Jones gnome(a)hawaii.rr.com exploring the landscape of god http://dancingtreefrog.com Sent from my Android device with F/LOSS K-9 Mail.

2 weeks, 4 days

Behringer FCB1010, or similar

by Worik

Friends I am looking for a MIDI foot pedal board for use with my LV2 simulators (https://github.com/worikgh/120Proof.git) I am considering the Behringer FCB1010 but i am naturally unsure if it is suitable I see on the interweb that it has all sorts of "banks" that can be programmed, but that interests me not What I care about is can I address it from a Linux box, see the MIDI events. Has anybody any experience with this, or recommendations for another product? I am currently using a SINCO pedal from Aliexpress.com that is great, but only has four switches I am keen on more options, and especially the expression peda pedals Worik Sent from Proton Mail Android

3 weeks

[ANN] Qtractor 1.4.0 - A Halloween'24 Release

by Rui Nuno Capela

Hello again, Qtractor 1.4.0 (halloween'24) is out! Change-log: - Improved color contrast on track and clip title labels, when given track foreground and background colors are too similar in lightness. - Clip/Split now also applies to multiple selected clips, on any other track than current, if the split point (play-head) is found within. - Clip Merge/Export... audio clips now taking the internal audio resolution (ie. 64 frames/period), independent to former JACK/Pipewire buffer-size/period. - New Clip Mute state property introduced. - New MIDI clip tool option: Normalize / Compress. - Prepping up next development cycle (Qt >= 6.8) 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-1.4.0.tar.gz - source package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-1.4.0-6.1.rncbc.suse.src.rpm - binary package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-1.4.0-6.1.rncbc.suse.x86_64.rpm - AppImage [7] package: https://download.sf.net/qtractor/qtractor-1.4.0-6.1.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: 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/ See also: https://www.rncbc.org/drupal/node/2685 Cheers && Keep having (lotsa) fun! - - - rncbc aka Rui Nuno Capela

3 weeks, 2 days

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Linux-audio-user November 2024