Linux-audio-user

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20706 discussions

[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, 9 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, 9 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, 9 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, 9 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, 9 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, 9 months

Re: [LAU] JACK, Qjackctl, and ffado

by Mac

I sent a long email about testing Ubuntu Studios Controls. Since it got dumped because it was too long thanks to inserting screen captures, I then wrote a fixed version and the subject changed creating broken thread. I'll paraphrase (and I hope this reply is going to the original thread. Sorry.) Short version: - Ubuntu Studio Controls doesn't know about ffado. - I attempted to force things from the command line, but was unsuccessful. In fact, I'm not sure I can even get Ubuntu Studo Controls to do nothing. - Ubuntu Studio Controls also has a problem with retaining the selections for bridging, etc. If you check them off, then logout/login or reboot they are back to default (checked). The last time I logged in and started Carla, there were 12 in/out's for the AF12 and 2 captures for the on board sound card... At first during my messing around I could only get the long form of the port names to show up (i.e. 00148605c4409ac_Unknown_out, 00148605c4409ac_Unknown0_out, etc.) and not human readable names like capture_1, etc. But, something I did is now causing the human readable version to appear...don't what caused this and not sure if it will be there when I boot tomorrow...

6 years, 10 months

Re: [LAU] Request to mailing list Linux-audio-user rejected

by Mac

I've been doing some experiments with the system I have. The system: the mobo has onboard 8 channels (front panel L/R, rear panel L/R, rear panel line out L/R, rear panel sub L/R) and a Echo AF12 on firewire. At this point UBS Controls can select between the on board and the AF12 (I assume when the AF12 is selected and 12 channels appear in Carla or Patchage this is via ALSA) Observations: - alsamixer shows both onboard and AF12 - when AF12 is selected in alsamixer, alsamixer shows nothing - when on board is selected in alsamixer, alsamixer shows the 8 outputs - when selected in UBS Controls the associated ports are shown in Carla/Patchage - when on board is selected, 8 ports are shown, but only the front panel L/R produce any signal when connected in Carla/Patchage (all 8 are unmuted and at 0db in alsamixer) anybody know how to get the other 6 outputs working? - when AF12 is selected 12 channels are shown in Carla/Patchage With on board selected and players/plugins started and connected between player and front panel L/R all appears good and sounds ok. With AF12 selected and same player/plugin combo is made sounds good, except occasionally REALLY nasty high volume (as in speaker/ear damaging loud) digital burst happens. In order to test with just ffado I attempted to adapt a script I use on another pc to force only jack. The adapted part shown below: #!/bin/bash set -x killall -9 jackd jackdbus #jack_control ds alsa dps capture none dps playback none jack_control ds firewire dps capture none dps playback none #jack_control dps device hw:PCH jack_control dps rate 48000 jack_control dps nperiods 2 jack_control dps period 1024 jack_control start pactl unload-module module-udev-detect pactl unload-module module-alsa-card pactl unload-module module-jackdbus-detect pactl load-module module-jack-sink client_name=PulseOut channels=2 connect=no pactl load-module module-jack-source client_name=PulseIn channels=2 connect=no set +x exit This results in the channels of the AF12 being listed like this: firewire_pcm 00148605c4409ac_Unknown_out 00148605c4409ac_Unknown0_out 00148605c4409ac_Unknown1_out 00148605c4409ac_Unknown2_out 00148605c4409ac_Unknown3_out 00148605c4409ac_Unknown4_out 00148605c4409ac_Unknown5_out 00148605c4409ac_Unknown6_out 00148605c4409ac_Unknown7_out 00148605c4409ac_Unknown8_out 00148605c4409ac_Unknown9_out 00148605c4409ac_Unknown10_out 00148605c4409ac_Unknown11_out Where Unknown_out is the 1st channel of the AF12, Unknown0_out is the 2nd channel, etc. (Unknown11_out is the midi port) I do not know how to get human readable names as can be done in Qjack... Anybody know how to do this from the command line? Or set the name of the device to something other than firewire_pcm? So far I have NOT been able to duplicate the crazy noise spikes I was getting with alsa running the AF12.

6 years, 10 months

[LAU] JACK, Qjackctl, and ffado

by Mac

Oh, and while alsamixer will allow the selection of the AF12, alsamixer then says the AF12 has no controls. So, to control the gains and such one has to figure out how to stop the alsa control of the AF12 and then start ffado to make any changes?

6 years, 10 months

[LAU] JACK, Qjackctl, and ffado

by Mac

Len said: "It does not use ffado at all but rather the built in ALSA firewire module stack. This means, do not try to use ffado-mixer, bad things will happen. Use alsamixer or the qasmixer (which is GUI based) instead. So far, anyone I have talked to that has had problems with fw devices in the past few years, since fw was added to ALSA, has had those problems because they tried to use ffado bits without first removing the alsa bits. So I am wondering how many people have firewire devices that have found the alsa drivers for firewire, when used correctly, don't work for them." So, I admit to some confusion... Until yesterday (when I added the back port) after boot the sound system would show a 12 channel device. At that point I would start Qjack. It's configuration is set to start ffado with 12 channels. I then hit start in Qjack and then 12 in/out ports would show in Qjack > Connect. If I understand your comment, this would be running the alsa stack AND the ffado stack against the firewire device? (In this case an AF12.) So, now if I start JACK from the UBS Controls, it is using only the ALSA stack? And the ports that show up in, say Patchage, are ALSA ports? So, when I'm doing "pro" audio with UBS I don't need ffado now? And, if so, how does one, for instance, send firmware updates to a fw device? (not that I expect to do that with an AF12...they stopped making it. :( ) Mac

6 years, 10 months

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Linux-audio-user