Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

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7500 discussions

by Peter

Dear All, inspired by the "A History of Audio on Linux somewhere?" I took a look at my very old Linux Audio projects. I have one which amazingly still compiles, namely FeigenSound from the Linux Magazin 03/2001, however I can't hear the output, even when the pcspkr module is loaded. I assume that todays Laptops just don't have speaker anymore. There I was using the KbdCtl.bell_* to generate tones with a given frequency and duration: // switch to new state KbdCtl.bell_percent = 100; KbdCtl.bell_pitch = Frequency; KbdCtl.bell_duration = Duration; XChangeKeyboardControl(pDisplay, KBBellPercent | KBBellPitch | KBBellDuration, &KbdCtl); Is there still such a simple method available to generate a tone with a given duration and frequency. Of course I could generate a corresponding array and send it to jackd, I'm just looking for something simple. Best regards, Peter

3 years, 4 months

Jack Transport Question

by Fons Adriaensen

Hello all, Looking at the Jack Transport state machine on <https://jackaudio.org/api/transport-design.html>, there is only one 'reposition' transition, and it goes to the 'Starting' state which then sooner or later will go to 'Rolling'. Q1: Does this mean it is impossible to reposition without starting ? Or is there just a transition missing in the diagram from 'Stopped' to itself ? Q2: Is there any way to find out, while 'Stopped', if all clients are ready to start immediately without actually starting ? I'd say at least one more state would be required. Ciao, -- FA

3 years, 4 months

A History of Audio on Linux somewhere?

by Philip Rhoades

People, I am just a regular user of Linux audio but I am interested in the history of how software was developed and what problems they were meant to solve on Linux eg OSS, ALSA, Jack etc and more recently PipeWire. Is there such a documented history already in existence on the web somewhere? (ie NOT a HOWTO) - that would be intelligible to non-audio professionals? I am interested in learning and understanding more about audio and perhaps making better use of my system (Fedora 34 + Wayland soon to be updated to 35). Thanks, Phil. -- Philip Rhoades PO Box 896 Cowra NSW 2794 Australia E-mail: phil(a)pricom.com.au

3 years, 4 months

Pipewire help?

by John Murphy

My QJackCtl Patchbay doesn't work any more and it's obvious there are new ways to get similar functionality with WirePlumber, but a little example would help. I seem to want to pipe the output of pw-link -l somewhere (pw-link -l | wireplumber --make_it_so). Need to always connect jack-play this way: $ pw-link -l alsa_output.usb-EDIROL_M-16DX-00.pro-output-0:playback_AUX0 |<- jack-play:out_1 alsa_output.usb-EDIROL_M-16DX-00.pro-output-0:playback_AUX1 |<- jack-play:out_2 jack-play:out_1 |-> alsa_output.usb-EDIROL_M-16DX-00.pro-output-0:playback_AUX0 jack-play:out_2 |-> alsa_output.usb-EDIROL_M-16DX-00.pro-output-0:playback_AUX1 Thanks. -- It gets harder to learn new things as we gets old.

3 years, 4 months

mididings Python woes; workaround or fix?

by Jonathan E. Brickman

Mididings may be the only JACK-api MIDI router/filter tool around; if there is another I'd love to know about it. On the other hand t was working just dandy until, I think, some changes to both Python3 and legacy support for Python2. I was using its Python3 AUR adaptation (mididings-git) under Manjaro, but then after package upgrades, it began to fail at 'from mididings import *' (see below). I found similar failures in Ubuntu 20, and found different failures in both when I tried setting up to use Python2 (which obviously we would rather not be doing). The failure is similar to a number of failures reported starting with Python 3.10, so this may be related, but I was not able to figure out how to apply those workarounds to the mididings source, I tried several different variations, including a number of the different forks in github. Thoughts, anyone? I found Pigiron and Jamrouter and puredata, but none of these appear to do JACK. I'm using pipewire now, so I could theoretically revise the whole rig around ALSA MIDI, but all of the apps needing MIDI use JACK, and mididings is so elegant... J.E.B. |[jeb@newbnr ~]$ python Python 3.10.1 (main, Dec 18 2021, 23:53:45) [GCC 11.1.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> from mididings import * Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib/python3.10/site-packages/mididings-2.0.0+r26a40db-py3.10- linux-x86_64.egg/mididings/__init__.py", line 15, in <module> from mididings.engine import run, process_file File "/usr/lib/python3.10/site-packages/mididings-2.0.0+r26a40db-py3.10-linux-x86_64.egg/mididings/engine.py", line 15, in <module> import mididings.patch as _patch File "/usr/lib/python3.10/site-packages/mididings-2.0.0+r26a40db-py3.10- linux-x86_64.egg/mididings/patch.py", line 15, in <module> import mididings.units as _units File "/usr/lib/python3.10/site-packages/mididings-2.0.0+r26a40db-py3.10-linux-x86_64.egg/mididings/units/__init__.py", line 14, in <module> from mididings.units.engine import * File "/usr/lib/python3.10/site-packages/mididings-2.0.0+r26a40db-py3.10-linux-x86_64.egg/mididings/units/engine.py", line 55, in <module> def SceneSwitch(number=_constants.EVENT_PROGRAM): File "/usr/lib/python3.10/site-packages/mididings-2.0.0+r26a40db-py3.10-linux-x86_64.egg/mididings/unitrepr.py", line 46, in composed return arguments.accept(*constraints, **kwargs) (store(f)) File "/usr/lib/python3.10/site-packages/mididings-2.0.0+r26a40db-py3.10-linux-x86_64.egg/mididings/arguments.py", line 49, in __init__ self.constraints = [_make_constraint(c) for c in constraints] File "/usr/lib/python3.10/site-packages/mididings-2.0.0+r26a40db-py3.10-linux-x86_64.egg/mididings/arguments.py", line 49, in <listcomp> self.constraints = [_make_constraint(c) for c in constraints] File "/usr/lib/python3.10/site-packages/mididings-2.0.0+r26a40db-py3.10-linux-x86_64.egg/mididings/arguments.py", line 160, in _make_constraint elif isinstance(c, collections.Callable): AttributeError: module 'collections' has no attribute 'Callable' >>>|

3 years, 4 months

Any csound experts here ?

by Fons Adriaensen

Hello all, I'm trying to help someone (OSX user trying out Linux) use Csound with Jack. What I'd need to know is which are the Csound command line options to * run Csound with Jack, * using Ninp input ports and Nout output ports, * not autoconnecting any ports, if that is possible at all... TIA, -- FA

3 years, 4 months

Re: [LAD] Linux-audio-dev Digest, Vol 179, Issue 15

by Stéphane Letz

Some old stuff on the JACK2 project: https://hal.archives-ouvertes.fr/hal-02158993 and http://lac.zkm.de/2005/proceedings.shtml https://hal.archives-ouvertes.fr/hal-02158922 (more generally https://hal.archives-ouvertes.fr/search/index/?q=JACK+grame&submit=) https://archive.org/details/LAC2009WhatSNewInJack2 Stéphane > Le 25 janv. 2022 à 12:00, linux-audio-dev-request(a)lists.linuxaudio.org a écrit : > > ------------------------------ > > Message: 3 > Date: Tue, 25 Jan 2022 19:09:53 +1100 > From: Philip Rhoades <phil(a)pricom.com.au> > To: Linux Audio Developers <linux-audio-dev(a)lists.linuxaudio.org> > Subject: [LAD] A History of Audio on Linux somewhere? > Message-ID: <56fa25296efbdfd75a37c512551f2974(a)pricom.com.au> > Content-Type: text/plain; charset=US-ASCII; format=flowed > > People, > > I am just a regular user of Linux audio but I am interested in the > history of how software was developed and what problems they were meant > to solve on Linux eg OSS, ALSA, Jack etc and more recently PipeWire. > > Is there such a documented history already in existence on the web > somewhere? (ie NOT a HOWTO) - that would be intelligible to non-audio > professionals? > > I am interested in learning and understanding more about audio and > perhaps making better use of my system (Fedora 34 + Wayland soon to be > updated to 35). > > Thanks, > > Phil. > -- > Philip Rhoades > > PO Box 896 > Cowra NSW 2794 > Australia > E-mail: phil(a)pricom.com.au > >

3 years, 4 months

pipewire

by Fons Adriaensen

Hello all, I'd like to test pipewire as a replacement for Jack (on Arch), and have been reading most (I think) of the available docs. What is clear is that I will need to install the pipewire and pipewire-jack packages. And then ? How do I tell pipewire to use e.g. hw:3,0 and make all of its 64 channels appear as capture/playback ports in qjackctl ? Note: I do not have anything PulseAudio (like pavucontrol) installed and don't want to either. If that would be a requirement then I'll just forget about using pipewire. TIA, -- FA

3 years, 4 months

Reminder: Calls for SMC-22 (Saint-Étienne, France) Are Still Open

by Stéphane Letz

Hi everyone, This is just a friendly reminder that the various calls for the 2022 Sound and Music Conference (SMC-22) that will take place in Saint-Étienne (France) on June 4-12, 2022 are still open: https://smc22.grame.fr/calls.html We welcome scientific, industry-oriented, and artistic submissions until February 8th (submission must be registered on the submission portal by February 1st, though). These are strict deadlines! We remain at your disposal if you have any questions. We look forward to seeing you in Saint-Étienne this Spring! Best, Romain Michon, Laurent Pottier, Yann Orlarey, Constantin Basica, Jérôme Villeneuve (SMC-22 Chairs)

3 years, 4 months

[ANN] Qtractor 0.9.25 - A Winter'22 Release batch #3

by Rui Nuno Capela

Hi everybody, Qtractor 0.9.25 (winter'22) is released! Change-log:: - Hopefully fixed an old MIDI off-timing bug noticeable only when exporting (Track/Export Tracks/Audio...) on large buffer-sizes (>= 2K frames/period). - Clip/File Loop Set menu command is now a toggle. - Fixed problem with punch-in/out and loop-recording being lost when stopping the play-head right after and between the loop-start and punch-in points, even though at least one cycle or take is through. - Dropped autotools (autoconf, automake, etc.) build system. - A more verbose warning question is issued, on whether to continue saving to an existing zip/archive directory and accept to replace and erase all its current data in the future. - Fixed potential crash on session close or application exit, when some plugins have been removed. 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-0.9.25.tar.gz - source package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.25-68.1.rncbc.suse.src.rpm - binary package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.25-68.1.rncbc.suse.x86_64.rpm - AppImage [7] package: https://download.sf.net/qtractor/qtractor-0.9.25-68.1.x86_64.AppImage Git repos: https://git.code.sf.net/p/qtractor/code https://github.com/rncbc/qtractor.git https://gitlab.com/rncbc/qtractor.git https://bitbucket.org/rncbc/qtractor.git Wiki (outdated; help wanted, please!): 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/ See also: https://www.rncbc.org/drupal/node/2305 Keep having fun, on the New Year! -- rncbc aka Rui Nuno Capela

3 years, 4 months

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Linux-audio-dev