Linux-audio-user August 2021

linux-audio-user@lists.linuxaudio.org

23 participants
21 discussions

A/V Synchronization issues with Firefox and JACK

by nik＠parkellipsen.de

Hi, I recently noticed that, when watching videos with Firefox in a JACK-only environment (no pulseaudio, usually), video and audio slowly but noticeably run out of sync over the course of 20min or so. Not sure when it started, but it didn't use to be like that before. I'm on Arch, FF compiled with JACK support (not using alsa2jack plugin). I'm running JACK at 44.1khz, blocksize 512. With pulseaudio, there's no such issues ... Anybody experiencing similar issues ? Best, Niklas

2 years, 8 months

Test - ignore

by Fons Adriaensen

Test message - just ignore. -- FA

2 years, 8 months

Studio Controls 2.2 Released

by Len Ovens

Studio-controls 2.2.0 has been released. https://ovenwerks.github.io/studio-controls/index.html Studio Controls is an audio utility that allows setting up a JACK based machine for every day use and features: - CPU governor adjustment - JACK real time access fixing - Multiple custom pulse/Jack bridges - Adding USB mics as JACK clients via zita-ajbridge - Switching from ALSA firewire modules to FFADO modules - Allows JACK to auto start at session start - Allows use of pulse as JACK's front end - NEW, connect audio and MIDI over network - NEW, open mixer on any device or ffado mixer With version 2.2, aside from many bug fixes, the changes include: - Update GUI for better clarity as well as incorporate new functionality - Connect Audio over network using zita-njbridge - Connect MIDI over network using qmidinet - Jack status gives info on startup and configuration - User scripts can be automatically run at 5 points in the Jack run cycle: - pre start - post start - post bridge activate - pre shutdown - post shutdown - Background process is much more stable -- Len Ovens www.ovenwerks.net

2 years, 8 months

Lenovo T15, JACK audio is distorted

by Fero Kiraly

Hi all, I've recently bought a new laptop: Lenovo Thinkpad T15 Gen 1 and I am stuck in running jackaudio server on internal soundcard. - pulseaudio works (without jack) - external soundcard with jackd works - when I run jackd on internal soundcard, everything look good (jackd is started, log looks normally, patch graph in Claudia looks good, pulseaudio to jack works (e.g. youtube videos had sound..), but when I run for example mpv, or supercollider, the sound is heavily distorted. ) Does anybody know where the problem is? Thank you. best Fero -- *Fero Kiraly, ooo* ferokiraly.com cluster-ensemble.com +421 904 219 364

2 years, 8 months

[music] Rainbow dream

by Jeanette C.

Hey hey, I just released a Berlin school inspired track called Rainbow dream: https://youtu.be/OzgsrWJaicw direct OGG download: https://www.dropbox.com/s/vd8i0kts3hc20lc/rainbow_dream.ogg The instruments were exclusively hardware (except for the snare which was created in Csound). Though the song wouldn't have been a quarter of what it is without the software sequencing, recording and processing. Enjoy and happy #808Day, 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, 8 months

Four free 808-loops: Happy #808Day 2021

by Jeanette C.

Hey hey, I just uploaded four 808 drum loops, recorded straight from my Behringer RD-8. You can listen to them: https://youtu.be/JpMPyRWsC5E and download them as uncompressed WAV files: http://juliencoder.de/sound/808day-2021.zip Enjoy and keep drumming, 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, 8 months

Why is Jack so slow?

by worik

Friends I have a Raspberry PI with a PI Sound board. Wanting to use modep (https://blokas.io/modep/) live I have hacked a pedal together and can change settings with it. modep is a gnarly ball of python and tomahawk (sp?) that I do not need so I have stripped down the actions the pedal needs to do to eight Jack operations: disconnect the left and right output and input, and reconnect them in a different way to affect an effect change. I have written a small rust programme with the jack crate to interface with Jack. Four disconnects, four connects. It takes over 200ms of system time, optimised rust. Two hundred milliseconds is a long time. Can anybody tell me why? Is there a solution? I am hoping to get it down to ten milliseconds. Worik -- If not me then who? If not now then when? If not here then where? So, here I stand, I can do no other root(a)worik.org 021-1680650, (03) 4821804 Aotearoa (New Zealand)

2 years, 8 months

Don't know if Linux is involved but the idea sounds interesting

by David W. Jones

Listen to the trees - Hidden Life Radio https://hiddenliferadio.com/ --- David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com Sent from my Android device with F/LOSS K-9 Mail.

2 years, 8 months

Please Examin this CNN Audio

by Chime Hart

OK, thanks to Gerhard for suggesting I upload a sample. What you will hear in this 19mb file. First 2minutes are commercials which sound fine, next several minutes of CNN coverage of an Impeachment trial preview. Full of jerky glitches. After that, back to good sounding commercials, and lastly again several seconds of glitchy CNN. Please download this from https://hubert-humphrey.com/cnn-audio-02112021.aac I really hope some1 can suggest a tool to clean this up. Thanks so much in advance Chime

2 years, 8 months

An Unusual artifact in a Recording?

by Chime Hart

Hi All: I guess I may have been on this list in 2015. Have no idea if its still active? I ripped an audio stream of CNN from tunein during an Impeachment Senate Trial this year. Commercials sound quite good, but when CNN anchors as well as Seante audio are playing, it has a sound of a jerking tape. When I tried looking up this type of issue, it mentions avidemux to fixit. I wrote an author of that program, who says I need to examin fps through mpv. So-far we are not making progress. Can any1 please suggest any tools, especially commandline Debian which would correct these audio glitches? If any1 wanted to hear any of these 3 recording, I could certainly upload to my web-site, but they range from 6-13 hours. Thanks so much in advance Chime

2 years, 8 months

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Linux-audio-user August 2021