Linux-audio-dev October 2021

linux-audio-dev@lists.linuxaudio.org

17 participants
7 discussions

RFT: implementation for MOTU FireWire series including CueMix DSP and CueMix FX

by Takashi Sakamoto

RFT: implementation of MOTU FireWire series CueMix DSP and CueMix FX Hi all, After investigation for protocols of MOTU FireWire series including features of CueMix DSP and CueMix FX, I've written implementation corresponding to the features in snd-firewire-ctl-services project[1]. If you are enough interested in it, would you please test the implementation? The first aim of this test request is to check whether the protocol implementation works as well out of my development environment. # Disclaimer * The aim of the work is to reveal relevant protocols so adequately and write the implementation. It is out of my scope to produce user-friendly applications such as GUI with cool user-delighted look and feel. (This is also the reason that the message is so long for general users.) # Acknowledgment When I made investigation plan for the protocols and evaluated the result of investigation, documents included in ffado source code[13] is helpful. The documentation includes a part of the result, while some parts are newly revealed in this time. I appreciate for document writers. # Current status * Below models are supported and I tested * 828 * 896 * 828mk2 * 896hd * 8 pre * Ultralite * 4 pre * Audio Express * 828mk3 (FireWire only/Hybrid) * Ultralite mk3 (FireWire only/Hybrid) * The most of control functions are available via ALSA control interface * Hardware metering support * Interaction support between on-board control component such as knob, utilizing notification mechanism of ALSA control interface # Requirements For the test, you need to solve long list of requirements since the protocol implementation is new and lays down user space as well as kernel space. I'm sorry for testers to discourage your motivation, but they are required... * Linux kernel v5.13 or later * a commit 66c6d1ef86ff ('ALSA: control: Add memory consumption limit to user controls')[2] is required since many user-defined control element sets are used. * Installation of backport codes for ALSA firewire stack * They comes from Linux kernel v5.16 prepatch (not released yet). * Please follow to instructions in my remote repository[3] * Installation of alsa-gobject v0.2.1 or later. * alsa-gobject project[4] provides libraries which perform as glue for several kind of language bindings to use UAPI of Linux sound subsystem. For detail, please refer to release announcement[5]. * Installation of libhinawa topic branch * libhinawa project[6] also provides library as glue for UAPI of ALSA firewire stack. * The topic branch (topic/motu-mixer-ioctl)[7] includes new APIs to use functions added in the kernel v5.16 prepatch. * Rust v1.51 or later * I use Rust programming language for the protocol implementation in user space side. * Build topic branch of snd-firewire-ctl-services * snd-firewire-ctl-services project[8] includes the series of implementation for protocols specific to ASICs/Vendors/Models. Additionally, as reference of service programs, it includes runtime implementation based on ALSA control interface and ALSA Sequencer interface. * The topic branch ('topic/motu-mixer-ioctl') includes implementation for the test. # Test procedure When the above requirements are satisfied, the service program can be build by below command line. It takes a bit long than compiling with C language since Rust compiler does more work than C (mainly due to type inference and lifetime check for safe runtime). $ cargo build -p snd-firewire-ctl-services The service program for MOTU FireWire series runs by below command line: $ cargo run --bin snd-firewire-motu-ctl-service CARD_ID The CARD_ID is the numeric ID of sound card corresponding to your device. You need to load ALSA firewire-motu driver in advance: $ sudo modprobe snd-firewire-motu $ cat /proc/asound/cards ... 2 [UltraLiteMk3 ]: FW-MOTU - UltraLiteMk3 MOTU UltraLiteMk3 (version:100800), GUID ... In the above example, CARD_ID should be 2. When the service program runs, you can see control elements via ALSA control interface. You can operate them by usual tools of ALSA control application, but I prefer 'qashctl' in 'qastools' project[11]. Due to specification of protocols defined by MOTU, notifications from the device for some controls are firstly available when isochronous packets are transmitted by the device. Please run any of ALSA PCM applications when testing. The aim of the request is whether the service program can be built and run out of my development environment. So I don't expect you so much. However, If you are interested, please check the other parts about which I concern: * The range of value for each control is valid or not. * Inverse evaluation of each control with boolean value. * The lack of control which should be produced by the service program. # Filing issues * Please use issue service in github.com[10]. * Preferable issues * The service program aborts when I operate control A. * The service program doesn't interact with on-board operation B. * The service program looks to be frozen when I operate C. * The behaviour of control element D is odd. * Unexpected issues * Why device A is not supported * It's preferable for you to take your time to cooperate with me if you wish. It might take a long time since the implementation lays down user space and kernel space. * If so, please file the issue to my remote repository for kernel prepatch[12]. * Why we have no GUI with cool look and feel * It's your work. The GUI application might be an ALSA control application which interacts with the service program. * I can not get which control value corresponds to actual ports * It is restriction under current design of ALSA control interface. We need to work for any extension to the design. * The name of control B is not user-friendly. * The name of controls are not fixed yet since we have few name convention for controls in studio-use equipments. It might corresponds to discussion in ALSA upstream. In my opinion, Linux audio developers have been enough lazy to the issue for recent decade. [1] https://github.com/alsa-project/snd-firewire-ctl-services/ [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… [3] https://github.com/takaswie/snd-firewire-improve [4] https://github.com/alsa-project/alsa-gobject/ [5] https://lore.kernel.org/alsa-devel/20200623093239.GA68404@workstation/ [6[ https://github.com/alsa-project/libhinawa [7] https://github.com/alsa-project/libhinawa/tree/topic/motu-mixer-ioctl [8] https://github.com/alsa-project/snd-firewire-ctl-services/ [9] https://github.com/alsa-project/snd-firewire-ctl-services/tree/topic/motu-m… [10] https://github.com/alsa-project/snd-firewire-ctl-services/issues [11] https://gitlab.com/sebholt/qastools [12] https://github.com/takaswie/snd-firewire-improve/issues [13] https://web.archive.org/web/20110704073441/http://subversion.ffado.org/brow… Cheers Takashi Sakamoto

2 years, 5 months

Re: [LAD] Programming LV2 plugin from scratch tutorial video series

by Fons Adriaensen

Sorry to _low_show - this was meant for the list. On Mon, Oct 11, 2021 at 03:19:45PM +0200, _low_show wrote: > Looks great, will make some time to try it out! Thanks for making this! I somehow deleted the original post, but refer to > https://youtu.be/51eHCA4oCEI > https://lv2plug.in/book I never got to grips with turtle. In particular not with things like: @prefix doap: <http://usefulinc.com/ns/doap#> . @prefix lv2: <http://lv2plug.in/ns/lv2core#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix units: <http://lv2plug.in/ns/extensions/units#> . All docs and tutorials I found mention that the URLs do NOT mean that an application reading a file that contains them would actually need to read them from the web (which would be a unacceptable security risk anyway). But that means that whatever is defined by those URLs must actually be hard-coded in any LV2 host that reads the 'manifest.ttl' or 'my-plugin.ttl' files. Which raises the question why those @prefix lines are required at all. They could be used in theory to check that what is hard-coded corresponds to what is defined in those URLs. But to do that the application would need to access them. So all that these lines seem to provide is some illusion of conformity which isn't enforced or checked at all. So the conclusion is that this isn't any better than any ad-hoc way of encoding the plugin metadata. Or am I missing something essential ? TIA for any reply that would enlighten me... -- FA

2 years, 6 months

SoundTracker 1.0.3 first pre-release

by Yury Alyaev

Hi all! I have recently released first preview of SoundTracker v1.0.3. Here are new features of this pre-release: * General: - Indication of the current playing instrument / sample number in scopes (optional via Settings) - On new instrument or sample loading ins / sample name(s) can be overwritten or kept (configurable via Settings -> GUI settings) - Extended pattern sequence editor with DND (activaled by right-click on the playlist area) * Instrument editor: - Envelopes cutting / copying / pasting / scaling - Indication of the keys playing with the current instrument also in the pattern / song playing mode * Track editor: - Track line insertion / removal - Masking for cut / copy / paste operaions I invite everyone to test this pre-release and look forward your feedback (bugreports and feature requests). Download: https://sourceforge.net/projects/soundtracker/files/ Regards, Yury.

2 years, 6 months

[ANN] Qtractor 0.9.24 - An Autumn'21 Release

by Rui Nuno Capela

Hello everybody, Qtractor 0.9.24 (autumn'21) is released! Change-log:: - A new option has been added to reset/resend all MIDI track/channel and buses controllers on playback start (cf. View/Options.../MIDI/Playback/Reset all controllers on playback start). - Whenever possible, avoid suggesting Save As... to an extracted archive/zip directory. - Fixed an old nasty mistake when renaming session names and then saving into an archive/zip bundle file (.qtz). - Fixed Mixer multi-row automatic layout consistency, when adding new or removing existing tracks or buses. 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-0.9.24.tar.gz - source package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.24-67.1.rncbc.suse.src.rpm - binary package (openSUSE Tubleweed): https://download.sf.net/qtractor/qtractor-0.9.24-67.1.rncbc.suse.x86_64.rpm - AppImage [7] package: https://download.sf.net/qtractor/qtractor-0.9.24-67.1.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/ [8] CMake, a cross-platform, open-source build system generator https://cmake.org See also: https://www.rncbc.org/drupal/node/2288 Keep the fun, always! -- rncbc aka Rui Nuno Capela

2 years, 6 months

Re: [LAD] Programming LV2 plugin from scratch tutorial video series

by _low_show

Looks great, will make some time to try it out! Thanks for making this! On Mon, 11 Oct 2021, at 12:00, linux-audio-dev-request(a)lists.linuxaudio.org wrote: > Send Linux-audio-dev mailing list submissions to > linux-audio-dev(a)lists.linuxaudio.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.linuxaudio.org/listinfo/linux-audio-dev > or, via email, send a message with subject or body 'help' to > linux-audio-dev-request(a)lists.linuxaudio.org > > You can reach the person managing the list at > linux-audio-dev-owner(a)lists.linuxaudio.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Linux-audio-dev digest..." > > > Today's Topics: > > 1. Programming LV2 plugin from scratch tutorial video series > (Sven Jaehnichen) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 10 Oct 2021 13:58:57 +0200 > From: Sven Jaehnichen <sjaehn(a)jahnichen.de> > To: linux-audio-announce(a)lists.linuxaudio.org, > linux-audio-dev(a)lists.linuxaudio.org, devel(a)lists.lv2plug.in > Subject: [LAD] Programming LV2 plugin from scratch tutorial video > series > Message-ID: <bd239f3c-c8d5-f4fa-d1b2-bb5525ff8a2a(a)jahnichen.de> > Content-Type: text/plain; charset=utf-8; format=flowed > > Hi, > > I started with a programming tutorial series about making LV2 plugins. > Really from scratch. Dedicated for beginners. > > I read in chats from so many hobbyist and bedroom producers that that > they want to make LV2 plugins but they don't have any idea how to start. > The most of them have got some basic programming experience. With Java, > Python, Javascript, or maybe some basic C/C++. I want to take them by my > hand and want to guide them to make some LV2 plugins. Step by step. I'm > also going to explain technical aspects. The turtle language, how LV2 > plugins work, what is realtime, and so on. > > The first videos are online: > > https://youtu.be/51eHCA4oCEI > > Two more are already pre-produced, and will follow within the next weeks. > > In addition, there's a great resource by David called LV2 book > https://lv2plug.in/book/ which helped me to start just a few years ago. > > Please give me some feedback. And I'm open for any suggestion. > > Regards, > Sven > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Linux-audio-dev mailing list > Linux-audio-dev(a)lists.linuxaudio.org > https://lists.linuxaudio.org/listinfo/linux-audio-dev > > > ------------------------------ > > End of Linux-audio-dev Digest, Vol 176, Issue 2 > *********************************************** >

2 years, 6 months

Programming LV2 plugin from scratch tutorial video series

by Sven Jaehnichen

Hi, I started with a programming tutorial series about making LV2 plugins. Really from scratch. Dedicated for beginners. I read in chats from so many hobbyist and bedroom producers that that they want to make LV2 plugins but they don't have any idea how to start. The most of them have got some basic programming experience. With Java, Python, Javascript, or maybe some basic C/C++. I want to take them by my hand and want to guide them to make some LV2 plugins. Step by step. I'm also going to explain technical aspects. The turtle language, how LV2 plugins work, what is realtime, and so on. The first videos are online: https://youtu.be/51eHCA4oCEI Two more are already pre-produced, and will follow within the next weeks. In addition, there's a great resource by David called LV2 book https://lv2plug.in/book/ which helped me to start just a few years ago. Please give me some feedback. And I'm open for any suggestion. Regards, Sven

2 years, 6 months

[ANN] QjackCtl 0.9.5 - An Autumn'21 Release

by Rui Nuno Capela

Hi all, ** QjackCtl - JACK Audio Connection Kit Qt GUI Interface [1] ** QjackCtl 0.9.5 (autumn'21) is released! QjackCtl is an aged yet modern, not so 'simple' anymore, Qt [2] application to control the JACK [3] sound server, for the Linux Audio [5] infrastructure. Change-log: - Streamlined Windows and MacOSX deliverables (by Alexis Murzeau). - Korean (ko) translation added (by JungHee Lee). Website: https://qjackctl.sourceforge.io http://qjackctl.sourceforge.net Project page: https://sourceforge.net/projects/qjackctl Downloads: https://sourceforge.net/projects/qjackctl/files - source tarball: https://download.sf.net/qjackctl/qjackctl-0.9.5.tar.gz - source package: https://download.sf.net/qjackctl/qjackctl-0.9.5-49.1.rncbc.suse.src.rpm - binary packages: https://download.sf.net/qjackctl/qjackctl-0.9.5-49.1.rncbc.suse.x86_64.rpm - AppImage [7] package: https://download.sf.net/qjackctl/qjackctl-0.9.5-49.1.x86_64.AppImage Git repos: https://git.code.sf.net/p/qjackctl/code https://github.com/rncbc/qjackctl.git https://gitlab.com/rncbc/qjackctl.git https://bitbucket.com/rncbc/qjackctl.git License: QjackCtl [1] free, open-source Linux Audio [5] software, distributed under the terms of the GNU General Public License (GPL) version 2 or later [6]. References: [1] QjackCtl - A JACK Audio Connection Kit Qt GUI Interface https://qjackctl.sourceforge.io [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/2285 Keep the fun, always! -- rncbc aka Rui Nuno Capela

2 years, 6 months

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Linux-audio-dev October 2021