Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

4 participants
7502 discussions

forward: jack session api in perl, python, ruby, and lua

by Joel Roth

I am forwarding a mail and sample code from Ed Sweeney (with permission). He'd appreciate any comments. --------------------------------------------------------------------- Joel, Programming jack is fun. Check out the attached, it is jack's simple_session_client.c in perl. I don't know how to test the savequit session events but support for them is coded and the sample processing totally works. I rewrote metro.c metronome in perl too, works. I have generated API libs for perl, python, ruby, and lua. Each of them has a reworked simple_client that works. Ruby has a bug with the metronome I haven't been able to find yet. I'm sure there are lots of bugs and wrong design choices and poorly chosen names but it is a start! The build system is messy. I'll put a tarball on a server and tar up a binary installable perl module today. If this looks like it will be usable, I'll put it on github. -- simple_client.pl -- #!/usr/bin/perl use jackscript; use strict; use warnings; use Cwd 'abs_path'; my $jc; if (defined($ARGV[0])) { print("restarting with uuid $ARGV[0]\n"); $jc = jackscript::JsClient->new("simpler", $ARGV[0], $jackscript::JackSessionID); } else { $jc = jackscript::JsClient->new("simpler", undef, $jackscript::JackNullOption); } my $in = $jc->registerPort("input", $jackscript::JackPortIsInput); my $out = $jc->registerPort("output", $jackscript::JackPortIsOutput); $jc->activate(); my $done = undef; until($done) { my $jsevent = $jc->getEvent(-1); if ($jsevent->getType() == $jackscript::PROCESS) { my $inbuffer = $in->getBuffer(); my $outbuffer = $out->getBuffer(); my $nframes = $outbuffer->length(); for (my $i = 0; $i < $nframes; $i++) { #copy input to putput my $s = $inbuffer->getf($i); $outbuffer->setf($i,$s); } } elsif ($jsevent->getType() == $jackscript::SAMPLE_RATE_CHANGE) { my $sr = $jc->getSampleRate(); print("sample rate change event: sample rate is now $sr\n"); } elsif ($jsevent->getType() == $jackscript::SHUTDOWN) { print("jack shutdown event\n"); $done = "done!"; } elsif ($jsevent->getType() == $jackscript::SESSION) { my $dir = $jsevent->getSessionDir(); my $uuid = $jsevent->getUuid(); my $se_type = $jsevent->getSessionEventType(); my $setypeTxt = $se_type == $jackscript::JackSessionSave ? "save" : "quit"; print("session notification: path $dir, uuid $uuid, type: $setypeTxt\n"); if ($se_type == $jackscript::JackSessionSaveAndQuit) { $done = "done!"; } my $script_path = abs_path($0); my $cmd = "perl $script_path $uuid"; $jsevent->setCommandLine($cmd); #tell jackd how to restart us } else { die("unknown event type\n"); } $jsevent->complete(); } print("simple_client.pl ended\n"); -- Joel Roth

13 years, 3 months

Getting jack samplerate and buffersize with portaudio.

by Rafael Vega

Hello. I'm using portaudio19 to write an app that connects to jack (and alsa) and I can't find anywhere in the portaudio api a way to ask jack for the current samplerate and buffersize. ¿Am I missing something obvious? ¿Do I have to use the jack api to get these params and then be able to use the portaudio api for starting a stream, implementing the audio callback, etc?

13 years, 3 months

AMS LV2 plugins: Version 0.0.7 - Include a Beat Repeater

by Aurélien Leblond

Hello everyone, Today I released the version 0.0.7 of the ams.lv2 plugins. What was done in this version: * The License file is updated * Ported from AMS: - Absolute - Inv * A new LFO based on the AMS one, but can be synced with Jack * A beat repeater: ~ ported from Tranches (http://hitmuri.net/tardigrade/index.php/En/News) ~ Synced with Jack * URI modified to http://avwlv2.sourceforge.net The beat repeater code is a bit raw, it works but it uses a lot of CPU cycles - more than I would like! As usual, comments, feedback and testing are more than welcome! My next step is to use the CV ports from LV2. Enjoy! Aurélien

13 years, 3 months

ANN: ChipSound 0.1.0 under zlib license

by David Olofson

ChipSound 0.1.0 under zlib license ---------------------------------- "I’ve decided to officially release the engines (scripting, physics, sound and 2.5D rendering) behind Kobo II as Free/Open Source, in order to make the game available to basically anyone with OpenGL and a C compiler. [...] First out is ChipSound, which is now under the zlib license. [...]" NOTE: ChipSound currently depends on SDL for audio I/O. Full story: http://olofsonarcade.com/2012/03/13/chipsound-0-1-0-released-zlib- license/ Direct download: http://www.olofson.net/download/ChipSound-0.1.0.tar.bz2 Related; Kobo II site: http://kobo2.net/ -- //David Olofson - Consultant, Developer, Artist, Open Source Advocate .--- Games, examples, libraries, scripting, sound, music, graphics ---. | http://consulting.olofson.net http://olofsonarcade.com | '---------------------------------------------------------------------'

13 years, 3 months

Ardour record status

by Fons Adriaensen

Hello all, Does anyone know of a way to monitor or poll Ardour's (global) 'record-armed' and/or 'recording' states from the outside ? The purpose is to control a 'recording' light in the studio. Ciao, -- FA Vor uns liegt ein weites Tal, die Sonne scheint - ein Glitzerstrahl.

13 years, 3 months

Re: [LAD] Tutorial for programming with JACK

by Kjetil Matheussen

Emanuel Rumpf: > > Am 8. M?rz 2012 01:08 schrieb <kallipygos(a)inbox.lv>: >> >> It is possible with (curses-ansi escapes) TUI vary sine parameters - >> Frequency and amplitude. >> > Possible with restrictions: > You cannot call blocking functions in jacks process() function. > Thus non-blocking inter-thread communication may be necessary. > >> >> Is it possible this program __as_is__ rewrite for jack output ? >> > > Jack Audio uses a _callback_ based api. > What you have there is not. > > You could re-use the above code with simple adjustments > by adding an additional bridging library. > (Eventually causing loss of realtime capabilities.) > > Look at : > > bio2jack -- http://bio2jack.sourceforge.net/ > Shouldn't be used. bio2jack both allocates memory and locks a mutex in the process callback. (yes, it still does, look at the code on sourceforge) > jackasyn -- > > http://packages.debian.org/search?suite=default&section=all&arch=any&search… > (I couldn't find its original home) Good advice. jackasyn is made properly.

13 years, 3 months

Tutorial for programming with JACK

by Kris Calabio

I want to learn how to program with JACK. I found this tutorial: http://dis-dot-dat.net/index.cgi?item=/jacktuts/starting/ linked from this page ( http://jackaudio.org/documentation ). I noticed that the tutorial has some broken links. Is this still a good resource to learn from? Or are there any better ones out there? Any suggestions will be much appreciated. Thanks, Kris

13 years, 3 months

Laborejo Release 0.1 Announcement

by Nils

Laborejo, Esperanto for "Workshop", is used to craft music through notation. It is a Lilypond GUI frontend, a MIDI creator and finally a tool collection to inspire and help you compose. It works by reducing music-redundancy and by seperating layout and data. Don't worry about the layout, just concentrate on the music. Screenshot (Laborejo and Lilypond, side by side): http://www.laborejo.org/images/screenshots/2012-01-31-223820_3840x1080_scro… This is the first release, version number 0.1 Download: https://github.com/nilsgey/Laborejo/tarball/0.1 Dependencies: http://www.laborejo.org/documentation There are too many features to mention them all and too many missing features and bugs to warn you. Most important known problems: * This is Alpha Grade Software. Don't use for long-term work. However, the produced midis and PDFs will last forever. * Performance can get bad very quickly if you use Containers. * There is no built-in sophisticated midi player/jack midi output yet. You have to export midi files. * Documentation is nearly non-existent. Have fun, it would be nice to hear from you! Nils http://www.laborejo.org (All kinds of crazy social web services are linked there!)

13 years, 3 months

[ANN] Qtractor 0.5.4 - Echo Victor shouts out!

by Rui Nuno Capela

Howdy, There's no victory over anything whatsoever. Read it again, it's just a codename. If that serves anything at all, to my own defense that is, Qtractor is still a pet project hobby of mine, as all things in Linux audio world for that matter. There's been too many saying and comparing Ardour vs. Qtractor. I'm seeing if often said in too many sentences lately and, believe me, I cannot stand comfortable with that saying no more. So here it goes: Ardour is a full fledged, pro-level DAW and, for crying out loud on its own, the flagship of the free/open-source pro-audio fleet and movement, not only Linux anymore nowadays. On the other hand, Qtractor is 'a sequencer' (hinted by its own subtitle, in case you didn't notice) with a twist and a few of a DAW features. And it strictly runs on the Linux platform only and most important yet, it has been targeted to a (re)creational personal home-studio audience ever since. Heard about the 'techno-boy bedroom' (with a guitar) folk? Well, that's exactly what it is, from day zero. Hope you all get the picture ;) Enough whining. Qtractor 0.5.4 (echo victor) is out and is shouting out loud! Release highlights: * Panic command button (NEW) * Improved audio/MIDI file resource management (NEW) * MIDI SysEx for instrument plugins (NEW) * MIDI Controller auto-hook option (NEW) * MIDI Tools resize ramp (NEW) * Revised plugin search directory paths (FIX) * MIDI zero-duration note-on/off queueing (FIX) * Audio linked-clips looping (FIX) Website: http://qtractor.sourceforge.net Project page: http://sourceforge.net/projects/qtractor Downloads: - source tarball: http://downloads.sourceforge.net/qtractor/qtractor-0.5.4.tar.gz - source package (openSUSE 12.1): http://downloads.sourceforge.net/qtractor/qtractor-0.5.4-3.rncbc.suse121.sr… - binary packages (openSUSE 12.1): http://downloads.sourceforge.net/qtractor/qtractor-0.5.4-3.rncbc.suse121.i5… http://downloads.sourceforge.net/qtractor/qtractor-0.5.4-3.rncbc.suse121.x8… - long time ago, far far away: user manual: http://downloads.sourceforge.net/qtractor/qtractor-0.3.0-user-manual.pdf Weblog (upstream support): http://www.rncbc.org License: Qtractor is free, open-source software, distributed under the terms of the GNU General Public License (GPL) version 2 or later. Change-log: - Direct access plugin/insert parameter changing tool-tip added. - A Transport/Panic action enters the scene, in a nostalgic attempt to emulate the all-MIDI-track-shut-off command of those drop-dead and primordial MIDI sequencers of all time. Now finally a keyboard shortcut and mouse click-away ;) - MIDI editor command redo/undo adjustment now effective on all other channel events besides notes, which overlap at the same event time. - A new File/Unlink menu action is now made available from the MIDI clip editor (aka. piano-roll) for detaching the current linked/ref-counted MIDI clip into a new auto-incremented SMF filename. - Some audio/MIDI content/media-file resource management is entering the scene, taking care of some file-system house-keeping, this gets evident on unsaved/dead recorded files being automaticaly removed from the file-system, on session close. - Killed the old and entirely deprecated LV2 Save/Restore and Persist feature/extensions support. - Auto-monitored MIDI events are now merged/queued correctly into the instrument plugin playback queue, avoiding sudden crashes, hopefully. - Awesome patch from Albert Graef, thanks, which makes most MIDI SysEx to get through MIDI instrument plugins at last; applies to DSSI and LV2 plugins only. - LV2 URID map/unmap feature support added. - Plugin parameter value redo/undo command aliasing fix. - Double-clicking in plugin list item now show/activates the plugin's editor window (was toggling visibility/activation). - Plugin path settings have been fixed again, with special regards to an effective LV2_PATH environment variable settlement. - Session properties dialog now asks to create a new session directory if the given one does not currently exist. - MIDI note names and their respective octave numbers are now compliant with the ISO standard where middle C (60) is now C4 (was C3). - Fixed audible glitch/pop at the beginning of an audio clip with long quadratic or cubic shaped fade-in (reported by Lougi Verona, thanks). - MIDI Controller Auto-Hook patch by Alessandro Preziosi, thanks. - Make sure all MIDI note-off are always queued after their respective note-on events when buffering for MIDI input of instrument plugins, event though for zero duration MIDI note events (hopefully fixing the hanging notes bug #3476124, as reported by Albert Graef, thanks). - LV2 MIDI-fx plugin support has been repaired. - Single-track clip selection logic corrected again, fixing multi-clip selection drag/move across an odd number of distinct tracks (after a bug report by Louigi Verona, on linux-audio-dev, thanks). - MMC Locate time-code hour bit-field fix; MMC Locate now also on loop turnarounds (patches by Albert Graef, thanks). - Looping across multiple linked/ref-counted audio clips was incredibly broken with complete out-of-sync playback. Hopefully fixed now, with auto-unlinking/cloning all the affected audio clip buffers. - Audio clip overlapping detection off-by-one(-frame) fix. - MIDI Tools/Resize value ramp mode has been added (mocking the 'resize to range' feature request #3467894, by Daniel MacDonald aka. danboid). Enjoy && Have fun! -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

13 years, 3 months

Re: [LAD] [LAU] Music made with Linux: Airship - A 16bit Soundtrack Theme

by Carlos sanchiavedraz

2012/2/29 Kevin Thoma <kevin.thoma88(a)gmail.com> > Hi there, > > really liking the piece, great job! And having just played one of those > RPGs for the first time in ages (and I do remember them from my childhood > days as well...), I can attest to the fact that it would them nicely. ;) > I agree that taking the drums out for one of the quieter parts would have > made for some nice contrast, but yeah, that's not a must. > > Best Wishes > Kevin > > > On Wed, Feb 29, 2012 at 6:30 PM, Nils <list(a)nilsgey.de> wrote: > >> Hello list, >> >> I would like to share a piece I've just finished. >> The original blog entry is here, but for your convenience I'll include a >> copy into this mail. >> Feel free to use any channel you want if you would like to comment on it. >> http://www.nilsgey.de/2012/02/29/airship-theme/ >> >> Airship - A 16bit Soundtrack Theme >> direct download: http://www.nilsgey.de/uploads/NilsGey-AirshipTheme.mp3 >> >> I have finished my first just-for-fun composition since a very long time >> ago. It is a game-soundtrack like piece I named “Airship”. I can imagine >> this in a Japanese 90’s RPG from the SNES or Sega Genesis/MegaDrive era. >> >> Software used: Laborejo composition and midi generation, Fluidsynth for >> midi to wave rendering and Ardour for the fadeout :) . >> >> I used an .sf2 called Setzers SPC which I have downloaded here. I am not >> sure about the soundfonts legal status so I am careful and release the >> Airship Theme not as a free piece but just as: Listen to it freely, share >> and redistribute it but don’t use it in any work, derived or original, or >> as part of a game or video etc. Don’t do anything commercial with it and >> don’t change the mp3 tags. If you find a named, matching License to this >> description feel free to use that instead. >> >> I would be very happy if you leave a comment or click this blogs “Like” >> button. >> >> >> Greetings, >> >> Nils >> http://www.nilsgey.de >> http://www.laborejo.org >> _______________________________________________ >> Linux-audio-user mailing list >> Linux-audio-user(a)lists.linuxaudio.org >> http://lists.linuxaudio.org/listinfo/linux-audio-user >> > > > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user(a)lists.linuxaudio.org > http://lists.linuxaudio.org/listinfo/linux-audio-user > > Hi, I concur with some said already; it reminds a bit of some soundtrack for a game and maybe, at 1:00 min and at 4:30 aprox., would be nice to have a quiet part as a middle section to rise then up as an anthem. Also would be advisable some processing (Delay, Reverb) on the mix to make the sound a more realistic, to mitigate the rude MIDI sound, and as if recorded in some space, a large hall i.e. Nice music, Thanks for sharing, Nils -- Carlos sanchiavedraz * Musix GNU+Linux http://www.musix.es

13 years, 4 months

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

Linux-audio-dev