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Faust MIDI?

by Carlo Capocasa

Hi, is it possible to send and receive MIDI with a FAUST program? Carlo

13 years, 7 months

Can an LV2 plugin legally modify input port values?

by Jeremy Salwen

It's not clear to me what is legal for an LV2 plugin to do with an input control port. Once the input port has been read, is it acceptable to use that location in memory as temporary storage in the "run" method? Is it the host's responsibility to re-fill the value of the parameter before every run call? Is it the plugin's responsibility to keep input-ports bit-exactly the same? What about transformations of the input which leave the value logically the same? For example, normalizing boolean inputs the values 0 and 1? The <http://lv2plug.in/ns/lv2core/#InputPort> documentation<http://lv2plug.in/ns/lv2core/#Port>is silent on this matter. Jeremy

13 years, 7 months

[ANN] QmidiNet 0.1.2 released!

by Rui Nuno Capela

A pretty old and terribly overdue JACK MIDI crash bug as been fixed. Hopefully at last. Ones who've been using the ALSA-MIDI (aka. ALSA Sequencer) interface exclusively don't need to worry. All the rest please apply ;) QmidiNet 0.1.2 released! Have fun! QmidiNet [1] is a MIDI network gateway application that sends and receives MIDI data (ALSA-MIDI and JACK-MIDI) over the network, using UDP/IP multicast. Inspired by multimidicast [2] and designed to be compatible with ipMIDI [3] for Windows. See also: http://www.rncbc.org/drupal/node/508 Website: http://qmidinet.sourceforge.net Project pages: http://sourceforge.net/projects/qmidinet Downloads: - source tarballs: http://downloads.sourceforge.net/qmidinet/qmidinet-0.1.2.tar.gz - source package (openSUSE 12.1): http://downloads.sourceforge.net/qmidinet/qmidinet-0.1.2-1.rncbc.suse121.sr… - binary packages (openSUSE 12.1): http://downloads.sourceforge.net/qmidinet/qmidinet-0.1.2-1.rncbc.suse121.i5… http://downloads.sourceforge.net/qmidinet/qmidinet-0.1.2-1.rncbc.suse121.x8… Weblog (upstream support): http://www.rncbc.org License: QmidiNet is free, open-source software, distributed under the terms of the GNU General Public License (GPL) version 2 or later. Change-log: - JACK MIDI in-bound buffering was originally flawed and often the cause for severe random crashes, mostly due to memory corruption, now hopefully fixed. - Changed order of JACK MIDI and UDP socket initialization, hoping the later is always owned by the current genuine process. - JACK MIDI interface were sinking all incoming events into the the first port, now fixed (heads up from Chris Goddard, thanks). - Make(ing) -jN parallel builds now available for the masses. - Fixed Makefile.in handling of installation directories to the configure script eg. --datadir. - Main context menu simple no-brainer reordering. References: [1] QmidiNet - A MIDI Network Gateway via UDP/IP Multicast http://qmidinet.sourceforge.net [2] multimidicast - sends and receives MIDI from ALSA sequencers over network http://llg.cubic.org/tools/multimidicast [3] ipMIDI - MIDI over Ethernet ports - send MIDI over your LAN http://nerds.de Cheers && Enjoy -- rncbc aka Rui Nuno Capela

13 years, 7 months

Open Audio Programming Tutorials

by Harry van Haaren

Hey All, After some very inspiring conversations at the LAC, I have decided to renew the efforts to document linux audio programming for beginners. I feel that although there's a lot of really useful tutorials out there, but there's still a lack of easy accessible introductory audio programming. Particularly topics such as threading, and thread synchronization are particularly difficult to learn, or even find relevant, easy to read code about. Announcing: Open Audio Programming Tutorials! This is a documentation effort, not of any particular library or tool, just "Linux Audio Programming" in general. Feel free to check the code posted, feedback on it, fork it and send me merge requests, whatever :) Currently there's 6 different tutorials, all C++ with GTKmm for user interfaces. Intentions are to add more as time permits! -Harry PS: Sending to Linux-Audio-User list in case there's people who want to try start programming, but haven't subscribed to the Linux-Audio-Developers list (yet). Replies to Linux-Audio-Developers please :)

13 years, 7 months

New SVN version of LV2:AVW - Crashes Ingen

by Aurélien Leblond

>> I have been trying to use GDB to debug this issue. >> Problem is, as the program crashing is Ingen, I get the information as to >> where it crashes in Ingen, not where the problem lies in my plugin. >> >> Would anybody have any ideas as to how to tacke this issue? >> > > If the plugin runs in a different process, > it may be necessary to attach that process to gdb. > Don't forget to compile with debug enabled. Thanks for that. I have tried to approach so far: * gdb --args ingen -eg I would then run my plugin, remove it, Ingen would crash, but I would get the information as to why Ingen crashed. I'm not even sure that GDB would see that it should debug the vco2.so as well * gdb vco2.so (vco2.so being the name of my plugin) Now I start Ingen, get the PID, and use attach 15674 in gdb (I tried with or without the plugin running). I get the following error message in GDB: (gdb) attach 15764B Attaching to program: /home/blablack/src/avw.lv2/build/avw.lv2/vco2.so, process 15764 Could not attach to process. If your uid matches the uid of the target process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf ptrace: Operation not permitted. I guess GDB is looking for the vco2.so when attaching... So what stupid thing am I doing? Thanks in advance for the help, Aurélien

13 years, 7 months

[ANN] QjackCtl 0.3.9 quietly emerges...

by Rui Nuno Capela

Guess what...? the last of the remnants quietly emerges :) QjackCtl 0.3.9 has been released, finally! Website: http://qjackctl.sourceforge.net Project page: http://sourceforge.net/projects/qjackctl Downloads: - source tarball: http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.9.tar.gz - source package (openSUSE 12.1): http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.9-1.rncbc.suse121.sr… - binary packages (openSUSE 12.1): http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.9-1.rncbc.suse121.i5… http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.9-1.rncbc.suse121.x8… Weblog (upstream support): http://www.rncbc.org License: QjackCtl is free, open-source software, distributed under the terms of the GNU General Public License (GPL) version 2 or later. Change-log: - Killing D-BUS controlled JACK server is now made optional, cf. Setup/Misc/Stop JACK audio server on application exit. (a patch by Roland Mas, thanks). - Added include <unistd.h> to shut up gcc 4.7 build failures. - Make(ing) -jN parallel builds now available for the masses. - A mis-quoting bug at the command line argument string may have been crippling the (unmaintained) Windows port since ever, leaving its main function to start jackd dead in the water, belly down :) now hopefully fixed (following a mail transaction with Stephane Letz and Mathias Nagorni, thanks). - Currently a JACK2-only feature, the JACK version string display at the About dialog box, must now be explicitly enabled on configure time (--enable-jack-version). - A new so called "Server Suffix" parameter option appears to rescue on the situations where QjackCtl falls short on extra, exquisite and/or esoteric command line options eg. (net)jack1/2 differences. - Fixed D-Bus Input/Output device parameter settings, filled when either interface is selected for Capture/Playback only. (probable fix for bug #3441860). - Fixed Makefile.in handling of installation directories to the configure script eg. --datadir, --localedir, --mandir. (after an original patch from h3xx, thanks). - Main window is now brought to front and (re)activated when clicking on the system tray icon instead of just hiding it. - Add current xrun count to the system tray icon tooltip, if not zero (after patch #3314633 by Colin Fletcher, thanks). Enjoy && Have fun! -- rncbc aka Rui Nuno Capela

13 years, 7 months

New SVN version of LV2:AVW - Crashes Ingen

by Aurélien Leblond

Hi everyone, I posted a new version of the LV2:AVW on the SVN: svn checkout svn://svn.code.sf.net/p/avwlv2/code/trunk avwlv2-code Unfortunately, it is crippled with a bug that I can't for the life of me fix! The scenario is as followed: - Open Ingen - Add one of these plugins - Remove it and Ingen crashes That other scenario would crash it too: - Open Ingen - Add one of these plugins - Add any other plugin (I use MDA) - Remove the MDA plugin, and Ingen crashes. Now, I don't think the issue lies in Ingen as I can add/remove any instances of the MDA plugins for example. But JALV or Ardour don't see to have this issue... I'm really looking for some help guys, because I have been trying to debug that one for few weeks now without much success. Thanks in advance for....anything! Aurélien

13 years, 7 months

Re: [LAD] First release of jack_export

by Kjetil Matheussen

Fons Adriaensen: > Subject: Re: [LAD] First release of jack_export > To: Paul Davis <paul(a)linuxaudiosystems.com> > Cc: Linux Audio Users <linux-audio-user(a)lists.linuxaudio.org>, Linux > Audio Developers <linux-audio-dev(a)lists.linuxaudio.org> > Message-ID: <20120513125244.GB24479(a)linuxaudio.org> > Content-Type: text/plain; charset=iso-8859-1 > > On Sun, May 13, 2012 at 08:39:18AM -0400, Paul Davis wrote: > >> On Sat, May 12, 2012 at 5:09 PM, Fons Adriaensen >> <fons(a)linuxaudio.org> wrote: >> >> > 2. Run jack_export. See --help for options. The --chan option is >> mandatory. >> > ? E.g. >> > >> > ? jack_export --chan 16 my16channelfile.wav >> > >> > ? Jack_export will connect to the 'export' bus if it exists, and >> print >> >> is there a difference between this and >> >> jack_capture --channels=16--port=ardour:export/out\* >> my16channelfile.wav > > AFAIK, jack_capture records in real time. Jack_export records while > Ardour is in freewheeling mode during exporting, so it's usually > 'faster than real time'. > jack_capture can already use the transport system to start and stop recording, so adding an option to record during freewheeling shouldn't be very hard. > Also, jack_export will ceate a proper WAVEX file (standard WAV must > not be used for > 2 channels) or CAF, or Ambisonic WAVEX, and provide > different output formats and optional dithering. > jack_capture does that too, except dithering. jack_capture also uses WAVEX as the default format for > 2 channels. Hmm, I might steel your freewheeling and dithering code into jack_capture. :-)

13 years, 7 months

release guitarix 0.22.3

by hermann

In behave of the guitarix development team I'm happy to announce a new bugfix release: guitarix 0.22.3. This is the 3. bugfix release after we reach version 0.22.0 as you can properly see on the version number. Below is a list of the squashed bugs, thanks goes to all users witch report them to us. version 0.22.3 fix: denormals generated under special circumstances fix: switch off auto_startup_notification for splash window (unity) convolver bugfix: use correct channel count Convolver bugfix: delay and maxsize must be based on system samplerate fix: preset_button in config mode version 0.22.2 fix: save scratch preset before switching to a newly created one version 0.22.1 fix: changed "requires" tag for gtk+ to 2.20 in gx_distortion_ui.glade ladspa_guitarix: fix preset loading ladspa_guitarix: fix module loading ladspa_guitarix: fix loading (undefined symbols) bugfix: wrong variable in crybaby UI get it here: http://sourceforge.net/projects/guitarix/ greets hermann

13 years, 7 months

First release of jack_export

by Fons Adriaensen

Jack_export is a simple command line app I've been using to do multichannel exports from Ardour2 sessions. Of course A3 provides this OOTB, but I will maintain jack_export to provide (if necessary) formats and options that A3 doesn't or won't support. This release does not include resampling, the sample rate of the exported file will be the current Jack sample rate. To use, proceed as follows: 1. (Optional) In Ardour, create a bus (not a track) named 'export', and containing all the signals you want to export. You can skip this step, in that case you'll have to connect Ardour outputs to jack_export inputs manually after step 2. 2. Run jack_export. See --help for options. The --chan option is mandatory. E.g. jack_export --chan 16 my16channelfile.wav Jack_export will connect to the 'export' bus if it exists, and print Ready ... If you did not create an 'export' bus in Ardour, now connect Ardour outputs to jack_export inputs manually. 3. Do a normal export in Ardour, using some dummy name for the exported file. As soon as Jack goes into freewheeling mode, jack_export will print Recording ... When the export terminates, jack_export will print a completion message reporting the number of seconds recorded. Now available on <http://kokkinizita.linuxaudio.org/linuxaudio/downloads/index.html> Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow)

13 years, 7 months

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Linux-audio-dev