Linux-audio-user

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20640 discussions

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

7 months, 3 weeks

ALSA output error (snd_pcm_open): Device or resource busy?

by Peter P.

Hi list, wanting to output audio from two applications at the same time using ALSA and not ~/.asoundrc in place, I am getting the following error for the second application (mpv) wanting to access the soundcard: ALSA lib pcm_dmix.c:999:(snd_pcm_dmix_open) unable to open slave [ao/alsa] Playback open error: Device or resource busy [ao] Failed to initialize audio driver 'alsa' Could not open/initialize audio device -> no sound. Querying my system for devices using $ arecord -L I get (amongst other interfaces and cards): default hw:CARD=PCH,DEV=0 HDA Intel PCH, ALC269VC Analog Direct hardware device without any conversions plughw:CARD=PCH,DEV=0 HDA Intel PCH, ALC269VC Analog Hardware device with all software conversions I remember that the hw: devices may not allow simultaneous access, but the plughw: might. So will it help to declare the plughw:CARD=PCH,DEV=0 as the "default", and how would I go about to do so? https://www.alsa-project.org/wiki/Asoundrc indicates I should setup dmix but I somehow wonder if/why the above doesn't work out of the box without an .asoundrc? Thanks for all ideas! Peter

7 months, 3 weeks

Rosegarden 24.12 Released

by Lorenzo Sutton

Forwarding to LAU in case there are interested users who are not on the Rosegarden mailing list ;-) -------- Forwarded Message -------- Subject: [Rosegarden-user] Rosegarden 24.12 Released Date: Wed, 4 Dec 2024 14:17:27 -0500 From: Ted Felix <ted(a)tedfelix.com> To: rosegarden-user <rosegarden-user(a)lists.sourceforge.net> ====== ROSEGARDEN 24.12 RELEASED ====== The Rosegarden team is proud to announce the release of version 24.12 of Rosegarden, a MIDI sequencer that features a rich understanding of music notation along with basic support for digital audio. http://www.rosegardenmusic.com/ Included in this release... ===== Bug Fixes ===== * LV2: Fix link problem with no gtk2. [2e168f0d] * LV2: Add lv2 check for GUI library ok. [9cb306b3] * Manage MIDI Banks and Programs dialog now allows the same bank MSB/LSB to be used for percussion and non-percussion banks on the same device. Bug #1692. * Fix wrong ports being assigned on file load. Bug #1687. [663099cc] * Fix autoscroll and highlighting behavior with multiple segments on a track. Bug #1672. * Fix missing scroll bar on Instrument Parameters Bank dropdown. Bug #1695. [295a2f7a] * Fix "turn repeats into copies" misses last segment. Bug #1696. [afcf2f0e] * Fix shortcut order ignored. Bug #1702. [b1272a6d] * Fix unexpected cursor position when moving from note to note on a bar with a clef or time signature. Bug #1704. [215b9d27] * Fix unexpected translation of bank and program names. Bug #1705. [6dbd6bcd] * Fix unexpected Save As... directory. Feature #522. [15db9d10] * Fix broken tempo line in tempo ruler after adding a time signature change. Bug #1706. [6a7ef89e] * Fix "Modify MIDI Filters" dialog does not mark document as changed. Bug #1707. [4e505977] * Fix LV2 sfizz plugin support. [8fce0614] * Fix group box formatting issue in native/light theme. Bug #1678. [d2df6376] * LV2: Fix crashes and locking related to atom buffers. [95b09722] [be37b31e] ===== New Features ===== * Make MIDI File Division value configurable for Export. GH #9. [991e4839] * WAV export of audio and soft synth tracks. File > Export > Export WAV File... [5b4d109e] * Apply interpretations to more than one segment. Segment > Interpret... Feature #517. [b8a243a5] * LV2 support has been promoted to beta. [a602850c] * Advanced Looping has been promoted out of beta. [25bdbf69] ===== General Improvements ===== * Manage MIDI Banks and Programs dialog is now full-featured and can be used to edit every aspect of an .rgd device file. Studio > Manage MIDI Devices > Banks... * Tempo and Time Signature Editor has been rewritten and improved. ===== Additional Contributions ===== * Korg-M3-Factory-ALL.rgd (Chuck Elliot) * Korg-M1.rgd (Chuck Elliot) * Updated Polish translation (Grzegorz Pruchniakowski) * Updated Chinese translation (Icenowy Zheng) * Yamaha-MM6-MM8.rgd (Icenowy Zheng) * Yamaha-PSR-SX600.rgd (Huanyu Liu) _______________________________________________ Rosegarden-user mailing list Rosegarden-user(a)lists.sourceforge.net - use the link below to unsubscribe https://lists.sourceforge.net/lists/listinfo/rosegarden-user

7 months, 4 weeks

Still doubt about frames/period and other related settings with Pipewire-jack

by Lorenzo Sutton

Hi LAU, I have now switched to pipewire on my main laptop, with an overall positive experience especially JACK-aware applications typically working 'out of the box' and (more or less) co-existing with other 'desktop' applications (I might talk about some caveats in a different thread). Something which I still can't totally work out though is jack frames/period (aka buffer size aka 'quantum') and its management. For 'everyday' use I keep this at 1024 (which I think is the default) but in some cases I want to push it down even to 128, and I must say that with recent versions of pipewire and with a reasonable 'cpu settings' (I have a tuxedo machine and it has its own cpu thingy) this actually works quite well. What I'm still not understanding completely is how to best manage the frames/period setting. Pre-pipewire in this use case I'd have dedicated qjackctl presets and just select the desired frames/period one for the sound device of interest, restart jack and be good to go. Now with Pipewire it seemed that this would be handled via pw-metadata and setting the clock.force-quantum value (I even made myself a script and then a little python-tk 'gui' for this and setting the sample rate). Up to recently indeed all of the previous preset-related settings in qjackctl (most notably sound device, sample rate, frames/period and periods/buffer) where disabled, but then now _only_ the frames/period setting dropdown seems to be available again and selectable. And indeed jack software (e.g. Ardour) seems to report that buffer size set in qjackcrl. But then if I do: pw-metadata -n settings 0 I see 1024 for clock.quantum and 0 for clock.force-quantum Explicitly setting clock.force-quantum also works. So I'm a bit confused. It seems the idea is to be able to change buffer size 'on the fly' or at least without restarting applications (e.g. in Ardour I _did_ have to disconnect and reconnect to JACK-pipewire, but without closing/reopening). Then I remember lots of discussions and advice about setting, for instance, the periods/buffer to 3 for USB sound devices etc. etc. With Pipewire we don't care about this any more? I also had a couple of instances where Ardour complained about the session being at 48000 but jack running at 44100 when actually it was running (reportedly) at 48000 - but then this is another matter, maybe. Hopefully getting insight on this could be helpful to other LAU 'transitioning' to Pipewire[-jack] :-) Lorenzo

7 months, 4 weeks

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.

8 months, 1 week

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.

8 months, 3 weeks

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, ⡍⠁⠗⠊⠕

8 months, 3 weeks

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.

8 months, 4 weeks

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

9 months

[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

9 months

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