Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

3 participants
7535 discussions

Re: [LAD] [Jack-Devel] First release of zita-ajbridge

by Stéphane Letz

Le 19 mars 2012 à 16:15, Nedko Arnaudov a écrit : > Stéphane Letz <letz(a)grame.fr> writes: > >> Le 19 mars 2012 à 15:20, Fons Adriaensen a écrit : >> >>> On Mon, Mar 19, 2012 at 01:19:25PM +0100, Stéphane Letz wrote: >>> >>>> I'm wondering how your code could replace the "adapter" mechanism >>>> that I did in JACK2 for that never worked fully reliably. Basically >>>> the "adapter" idea is a bit more general in the sense that it aims >>>> at "adapting" streams in different context: like network <==> Audio >>>> API (CoreAudio for OSX, ALSA for Linux, PortAudio for Windows...), >>>> or several ALSA devices..etc.. (The adapters are also developed as >>>> "in server" clients, this make a bit more easy to add them in a >>>> running session using "ladish" kind of studio management >>>> approaches...) > > In fact, ladish doesnt manage in-server clients at all. It can only > restore jack settings, and they could include stuff like in-process > clients and slave drivers. jackdbus provides engine parameter for the > latter but doesnt for the former. > > -- Well there is a control API to load/unload in-sever client. I was thinking this API could be used with ladish... Stephane

13 years, 11 months

Re: [LAD] First release of zita-ajbridge

by Stéphane Letz

> ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 18 Mar 2012 21:22:28 +0000 > From: Fons Adriaensen <fons(a)linuxaudio.org> > Subject: [LAD] First release of zita-ajbridge > To: Linux Audio Users <linux-audio-user(a)lists.linuxaudio.org>, Linux > Audio Developers <linux-audio-dev(a)lists.linuxaudio.org> > Message-ID: <20120318212228.GA19153(a)linuxaudio.org> > Content-Type: text/plain; charset=us-ascii > > Hello all, > > The first official release of zita-ajbridge is now available at > <http://kokkinizita.linuxaudio.org/linuxaudio/downloads>. > > Quoting the README: > > This package provides two applications, zita-a2j and zita-j2a. > They allow to use an ALSA device as a Jack client, to provide > additional capture (a2j) or playback (j2a) channels. > Functionally these are equivalent to the alsa_in and alsa_out > clients that come with Jack, but they provide much better audio > quality. The resampling ratio will typically be stable within > 1 PPM and change only very smoothly. Delay will be stable as > well even under worse case conditions, e.g. the Jack client > running near the end of the cycle. > > You will also need the latest zita-resampler and zita-alsa-pcmi > libraries. > > All feedback welcome. > > Ciao, > > -- > FA Really interesting.... I'm wondering how your code could replace the "adapter" mechanism that I did in JACK2 for that never worked fully reliably. Basically the "adapter" idea is a bit more general in the sense that it aims at "adapting" streams in different context: like network <==> Audio API (CoreAudio for OSX, ALSA for Linux, PortAudio for Windows...), or several ALSA devices..etc.. (The adapters are also developed as "in server" clients, this make a bit more easy to add them in a running session using "ladish" kind of studio management approaches...) How complex do you think it would be? Thanks. Stéphane

13 years, 11 months

[LAD] Announcing the first 'Hydrogen Spring Drum Kit Contest'

by thijs van severen

(apologies for cross posting) The Hydrogen team is excited to announce the first 'Hyrdogen Spring Drum Kit Contest' ! As you all know, a drum machine is only as good as the sounds it produces -no matter how many whistles and bells it boasts. Some time ago there was a small poll on the Hydrogen site asking the Hydrogen users (aka 'you' ;-) what feature they wanted more than anything else. The answer was clear : "more and better drum kits". The goal of this fun contest is simple : with your help we can expand Hydrogen's sound library with some great new drum kits, and since this is a contest there are some really neat prizes to win! So if you have been playing with samples and thinking about creating a drum kit, but then decided not to do so after all : now is the perfect time to push yourself and go that extra mile. Once it's done you'll feel so much better ;-) Or maybe you have already made a drum kit in the past but didn't think it was worth submitting? Think again and share your hard work with the rest of the world! Curious ? Check out the details on the contest page <http://hydrogen.popez.org/hcms/node/2035> Hope to hear from you soon ! The Hydrogen team

13 years, 11 months

[LAD] 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, 11 months

[LAD] 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, 11 months

[LAD] 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, 11 months

[LAD] 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, 11 months

[LAD] 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, 11 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, 11 months

[LAD] 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, 11 months

Jump to page:

2026

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