Linux-audio-user May 2019

linux-audio-user@lists.linuxaudio.org

21 participants
29 discussions

by soffioalcuore＠posteo.net

hello, I refer to a topic which had shortly been discussed last year (https://www.spinics.net/lists/linux-audio-users/msg110169.html). somebody wrote he was already in contact with soundcraft about the problem that in linux there's no possibility to choose the source of the channels 3&4 of the soundcraft notepad 12fx to be send via usb to the computer. I would like to ask if there's news about it. thank you very much! christoph

6 years, 8 months

[LAU] Why doesn't Jack work in duplex mode?

by François-Xavier Thomas

Hello all, I posted this on Reddit a while ago, but I hope you folks might have some more luck than people on r/linuxquestions. I'm trying to find out why Jack2 works with playback-only as well as capture-only, but not both. If anybody has any clue as to why that is or how to start debugging it, I'd be grateful! * `jackd -d alsa -D -d hw:1,0`: Duplex mode, doesn't work. * `jackd -d alsa -C -d hw:1,0`: Capture-only mode, works. * `jackd -d alsa -P -d hw:1,0`: Playback-only mode, works. I'm using the default settings (1024 frames/period with 2 periods/buffer @ 48kHz sampling rate). The sound card is a `bytcrrt5640` (`hw:0` is another card connected to HDMI outputs). Pulseaudio is using 48000 frames/period with 2 periods/buffer @ 48kHz for comparison, and appears to work fine on the exact same soundcard (I used `pacmd list-sinks` and `/proc/asound/card1/**/hw_params` to get that info). By "doesn't work", I mean : when trying to run `jackd` in duplex mode, a slight "pop" sound can be heard from the speakers, then the dmesg logs fill with the following line: intel_sst_acpi 808622A8:00: sst: Busy wait failed, cant send this msg `jackd` then freezes, and nothing short of `kill -9` can make it go away (which incidentally makes the speakers emit another small "pop"). The dmesg line is the same mentioned in https://lkml.org/lkml/2018/2/18/117, but I did not find a lot of info on it. Cheers, François-Xavier

6 years, 8 months

[LAU] Two M-Audio Delta 1010s available

by Joe Hartley

Now that I have settled in with my Babyface Pro and my Soundcraft mixer, my Delta 1010s sadly have no place in my studio anymore. Since one of them came my way for free in exchange for documenting the capacitor upgrade process, I'd like to return the favor and offer them for free to anyone on the list who would like them. You only have to cover the cost of shipping. Each is a full unit with PCI card, breakout rack panel, DB25 cable, and power supply. Both breakout panels have had the power cap upgrade as documented at https://delta.brainiac.com/delta1010capfix.html Please email me off-list if you'd like these. -- ====================================================================== Joe Hartley - UNIX/network Consultant - jh(a)brainiac.com Without deviation from the norm, "progress" is not possible. - FZappa

6 years, 8 months

[LAU] Someone posted this question on Linux Questions

by David W. Jones

https://www.linuxquestions.org/questions/linux-newbie-8/multi-channel-autop… > Hello, I have a Raspberry Pi 3B+ with a Terratec Aureon 7.1 > usb Sound Card. I'm looking for a player/sequencer which > starts at startup and automatically starts playing a 6-channel > audio track. Can anybody help me with this? > > I've tried VLC and set everything on Dolby surround but it > didn't work. Just wondering. The post has lots of views but no answers. -- 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.

6 years, 8 months

[LAU] Yoshimi 1.5.11.1

by Will Godfrey

This should have been 1.5.11 but after carefully making sure I had the code and all the associated bits fully up-to-date I forgot to add in the new user guide - DOH Anyway... 1.5.11 Waxwing Main feature additions/improvements: The Mixer panel now presents parts with separate left and right VU meters. There is an overall mono/stereo button in the main window. If any controls in an effect are different from the listed preset, the colour of the preset background is changed to a strong blue. When an AddSynth voice or modulator is using the oscillator from a lower numbered one, on entering the waveform editor there is a warning in red at the top of the window. In the microtonal section the 'A' note frequency range has been fixed as 329Hz to 660Hz. All controls that operate only when others are in particular states are shown as inactive when not available. There is a small information window that opens instantly, and only remains visible until the main window is displayed. On a first time start there is a window overlaying the centre of the main one, prompting you to check settings via the Yoshimi drop-down menu. More details in /doc/Yoshimi_1.5.11_features.txt Yoshimi source code is available from either: https://sourceforge.net/projects/yoshimi Or: https://github.com/Yoshimi/yoshimi Full build instructions are in 'INSTALL'. Our list archive is at: https://www.freelists.org/archive/yoshimi To post, email to: yoshimi(a)freelists.org -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

6 years, 8 months

[LAU] LAC Video Streaming and IRC Channel

by LAC

Hi everyone, LAC is just a few days ahead now! If you can't make it to the conference, we'll be video streaming paper presentations. Instructions on how this will work can be found on the conference website: https://lac.linuxaudio.org/2019/#streaming Feel free to ask if you have any questions! Cheers, The LAC-19 Team

6 years, 8 months

[LAU] A Small Thing

by Erik Schoster

Hi all, I'm working on an open source (well public domain) computer music system for python called Pippi. It's a library for non-realtime composition: python scores. It's in the 4th beta of the 2.0 -- the 1.0 series was all python2 and based around bytestrings, while the 2.0 is python3 and hopefully a bit more python-ish making use of numpy-backed classes that do some operator overloading and provide a set of affordances for transforming buffers, processing or synthesizing sounds. I'm also working on a live / "just in"-real-time (meaning asynchronous processing mixed in realtime) system called astrid meant for performance / live-coding / development etc. This is very much alpha in its current form, also a rewrite from previous built-in features from the 1.0 series... Anyway! Here's a snippet of two instruments running in astrid: https://www.dropbox.com/s/5fbglgx7ts1656l/asmallthing.mp3?dl=0 One is just a simple granular smoosh of a recording of a particularly harmonic water pump. The other is a 2d pulsar OSC using a stack of wavetables derived from a convolution of some vocal and guitar recordings my friend made, occasionally also processed with waveset-based procedures (ripped from Trevor Wishart's Audible Design book) and some other time domain processes. This is pippi: https://github.com/luvsound/pippi I've been working on this for a long time but documentation sucks... I'm more than happy to field any questions anyone who is kind enough to try to dive in might have, and really do plan to work on the docs soon! Here's a start: http://htmlpreview.github.io/?https://github.com/luvsound/pippi/blob/master… Erik

6 years, 8 months

[LAU] Berlin Linux Audio meeting @ c-base 2019-05-14

by Daniel Swärd

Hi all. As usual the second Tuesday of the month is upon us. I'll be in the mainhall from 20:00. See you there. Cheers /Daniel PS Yes, I did copy-paste from the previous mail... DS

6 years, 8 months

[LAU] Behringer UMC1820 suddenly stopped working with JACK2 (after re-install)

by nik＠parkellipsen.de

Hi, i recently re-installed Arch Linux on my laptop after a disk swap and suddenly JACK2 (non-dbus) doesn't run with my Behringer UMC1820 anymore. I kept the old system up-to-date and it was working perfectly well. Also, I don't remember making any special adjustments to get it up and running. My other cheapo Behringer (UCA202) still works fine, so i assume it's not a general USB audio problem ? The device is still shown in alsamixer, levels can be set. A friend tried it on her Mac and it worked there, so I assume the interface itself is still running. uname -a says: Linux atarashii 5.0.13-arch1-1-ARCH #1 SMP PREEMPT Sun May 5 18:05:41 UTC 2019 x86_64 GNU/Linux I usually start jack2 like this (works with the other device): jackd -P98 -dalsa -dhw:2 -p512 -n3 -o2 -r44100 The error message is: ALSA: use 3 periods for capture ALSA: final selected sample format for playback: 24bit little-endian in 3bytes format ALSA: cannot set channel count to 2 for playback ALSA: cannot configure playback channel Released audio card Audio2 audio_reservation_finish Cannot initialize driver JackServer::Open failed with -1 Failed to open server Has anybody experiences something similar ? I don't have any idea right now ... Best, Niklas

6 years, 8 months

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Linux-audio-user May 2019