Linux-audio-dev

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[linux-audio-dev] CLAM 1.0, the Berlin release

by Pau Arumi

We are very happy to announce the CLAM 1.0 "Berlin" release while having splendid views of the Alps in the flight to Berlin for the Linux Audio Conference. This release is indeed a major milestone for the project and it opens a door to the development of exciting new features, so keep tuned! Apart of these big changes expect also bug fixes (yes 1.0 have bugs) as we move on. Learn about CLAM in the web: http://clam.iua.upf.edu Last months have been very positive: many new people showed interest and contributed in the mailing lists, CLAM got packaged for almost every Linux distribution, and we got enormous activity in the svn source repository. We also welcome Andreas as an active developer and we hope that the forthcoming Google Summer of Code will also bring new talent aboard. These are the substantial changes from 0.98: NetworkEditor (now in version 1.0 like the CLAM libs) let the user embed any Ladspa plugin in the network as if it was a CLAM processing. This combined with the fact that you already can compile a network as a new Ladspa plugin library bringing a new world of possibilities. Portaudio is now the common stable audio back-end and its usability have been improved. However, jack is still taken as the default back-end in linux and osx. The interaction between Network and its FlowControl have been totally redesigned, fixing many bugs related with complex network topologies. A new FreewheelingNetworkPlayer class permits offline execution of networks, and it comes along with a new binary for command-line use. At users petition we've also added SMSTools related command-line binaries. On the signal processing front, we have added a fftw3 and experimental vowel synthesis processings. As always, see detailed changes in the change-logs [1] Find in the download section[2] the usual binaries for Mac OSX (Intel and PowerPc), Windows, Linux (Debian sid, Ubuntu Edgy and Feisty) and also new packages for Fedora Core 6 and OpenSuse. Thanks Fernando, Toni, Paul and others for the great help with packaging! The CLAM team 1. http://iua-share.upf.edu/svn/clam/trunk/CLAM/CHANGES http://iua-share.upf.edu/svn/clam/trunk/NetworkEditor/CHANGES 2. http://clam.iua.upf.edu/download.html

18 years, 9 months

[linux-audio-dev] Vamp audio analysis plugin API 1.0 released

by Chris Cannam

Vamp Plugin API and SDK 1.0 released ==================================== The Centre for Digital Music at Queen Mary, University of London are happy to announce the 1.0 release of the Vamp Plugin API and software developers kit. http://www.vamp-plugins.org/ Vamp is a plugin API for audio analysis and feature extraction plugins written in C or C++. Its SDK features an easy-to-use set of C++ classes for plugin and host developers, a reference host implementation, example plugins, and documentation. It is supported across Linux, OS/X and Windows. The Vamp plugin API is also used by the Sonic Visualiser audio visualisation and analysis application. http://www.sonicvisualiser.org/ The development of the Vamp plugin API and Sonic Visualiser was partially supported by the SIMAC project (http://www.semanticaudio.org/) and the EASAIER project (http://www.easaier.org/), with assistance from CHARM (http://www.charm.rhul.ac.uk/). Chris

18 years, 9 months

[linux-audio-dev] [OT] Recommendations for high quality blank CDs

by Jonathan Ryshpan

I need to make some CDs for archiving and need to buy some blanks of the highest quality, in the sense that data recorded on them will last the longest time. Does anyone have any suggestions? Useful web sites? Thanks - jon

18 years, 9 months

[linux-audio-dev] Regarding nekobee et al

by Gordon JC Pearce

Firstly, I'd like to apologise for acting like a total arse about this. It wasn't originally my intention to remove the site, but then a slip of the finger with fdisk during my Nth reinstall that day kind of put paid to it. The site and svn repository were backed up the day before, thanks to someone with more foresight than I. After I took the site down I got a surprising number of emails from people who said they quite liked using nekobee, and asking what was happening with it. The polite "hey I liked it" emails (you know who you are) prompted me to look at getting it back and stop acting like a dick. I also got quite a few really nasty emails which I won't go into lest I incite a (another) flamefest. Suffice it to say that posting "You'd better release the source, I know where you live" and a copy of my contact details from whois *didn't* encourage me to bring the site back up. It did, however, get forwarded onto Strathclyde Police's Computer Crime Division (or whatever they call themselves). You know who you are, too. Anyway. I don't (really really don't) have time any more to do any audio work on computers. Maybe in a few months that will change, we'll have to see. In the meantime, if anyone would like to take over any of the projects (I've got a couple of experimental things I never bothered to make public, and a few ideas on where to take them), then please email me off-list to discuss it. Gordon

18 years, 9 months

[linux-audio-dev] Linux Audio Conference 2007 live streams

by Eric Dantan Rzewnicki

The Linux Audio Conference takes place this week 22-25 March, 2007. As in past years LAC2007 will be streamed live in ogg vorbis and theora via icecast. If you would like to watch or listen to the streams please check out the conference wiki streaming page: http://www.medienwissenschaft.hu-berlin.de/lawici/index.php/Live_Streaming Information on the conference itself, including talks, abstracts, schedule and procedings: http://www.kgw.tu-berlin.de/~lac2007/index.shtml -LAC Stream Team

18 years, 9 months

[linux-audio-dev] ANNOUNCE: Sonic Visualiser and Vamp plugin SDK 1.0pre3 released

by Chris Cannam

Announcing the release of Sonic Visualiser 1.0pre3, a pre-release for the soon forthcoming Sonic Visualiser 1.0. http://www.sonicvisualiser.org/ Sonic Visualiser is an application for viewing and analysing the contents of music audio files. It contains advanced waveform and spectrogram viewers, as well as editors for many sorts of audio annotations. Besides visualisation, it can make and play selections based on the locations of automatically detected features, seamlessly loop playback of single or multiple noncontiguous regions, synthesise annotations for playback, and time-stretch playback while retaining display synchronisation. Sonic Visualiser also makes use of the Vamp plugin API, for plugins that extract descriptive or analytical data from audio. Vamp is an easy to use plugin API with a comprehensive and well-commented SDK, and is now frozen for the Vamp 1.0 release. Sonic Visualiser is Free Software distributed under the GNU General Public License. The 0.9 release is available now in source code form or as binaries for Linux, OS/X, and Windows. For more information and downloads, please see http://www.sonicvisualiser.org/ For more information about Vamp plugins, please see http://www.sonicvisualiser.org/vamp.html See also the SourceForge page for this project at http://www.sourceforge.net/projects/sv1/ Sonic Visualiser was developed at the Centre for Digital Music, Queen Mary, University of London and partially funded by the European Commission through the SIMAC project IST-FP6-507142 and the EASAIER project IST-FP6-033902. Chris

18 years, 9 months

[linux-audio-dev] [ANN] GMIDImonitor 3.1 released

by Nedko Arnaudov

GMIDImonitor is GTK+ application that shows MIDI events. New in this release: * Fix build against old jackmidi (0.102.20) * Fix bug (not showing channel for note off messages) Project site: https://gmidimonitor.bountysource.com/ Screenshot: https://gmidimonitor.bountysource.com/FileDownload?file_id=50&inline=yes Source tarball can be downloaded from project site, "Downloads" section -- Nedko Arnaudov <GnuPG KeyID: DE1716B0>

18 years, 9 months

[linux-audio-dev] [ANN] GMIDImonitor 3.0 released

by Nedko Arnaudov

GMIDImonitor is GTK+ application that shows MIDI events. New in this release: * Switch to autotools. * LASH is now optional. * JACK MIDI support (both old 0.102.20 and new one 0.103.0). * LASH, JACK MIDI and ALSA MIDI can be force disabled by passing option to configure script. * Shortcut for clearing list (ctrl-x). Project site: https://gmidimonitor.bountysource.com/ Screenshot: https://gmidimonitor.bountysource.com/FileDownload?file_id=50&inline=yes Source tarball can be downloaded from project site, "Downloads" section -- Nedko Arnaudov <GnuPG KeyID: DE1716B0>

18 years, 9 months

[linux-audio-dev] denormals or ... ?

by Dave Phillips

Greetings: I have a problem with a piece I'm working on in Rosegarden 1.5. I've appended the text I sent to Chris Cannam, along with his response (I hope he doesn't mind). Btw, the machine is based on an AMD64 3200+, with 2G RAM and an 80G hard drive. Sound runs through an M-Audio Delta 66. Distro is 64Studio 2.0. My questions lead, Chris's replies follow : >> 2) I've written a piece consisting of six tracks with these specs: >> >> Tr.1 (audio) drum loop, repeated, 1 plugin (CAPS plate reverb 2x2) >> Tr.2 (MIDI) bass part, repeated, uses patch from 8mbgmsfx.sf2 >> soundfont, no fx (part is rendered via QSynth which does have its >> reverb active) >> Tr.3 (audio) rhythm guitar loop, repeated, 3 fx (dj EQ mono, CAPS >> compress, CAPS plate 2x2) >> Tr.4 (audio) lead guitar, no repeats or copy, 4 fx (CAPS plate 2x2, >> AmpIV, AM pitch shifter, multiband EQ) >> Tr.5 (audio) riff loop, copied, 3 fx (dj EQ mono, CAPS compress, >> CAPS plate 2x2) >> Tr.6 (audio) another percussion loop, copied, no fx >> >> At 120 BPM the piece is 200+ measures long. It plays along >> swimmingly, but at m. 74 (about two minutes into the piece) the sound >> cuts out entirely. RG continues to run, but it pops up a message >> telling me that there's not enough CPU for realtime processing. Up to >> that point JACK reports approximately 33% CPU usage and no errors, >> but then it reports 0(1024) for xruns. I don't know what the second >> number (1024) means to JACK, but it keeps rising (with no sound) >> until I halt RG. > > That sounds a bit like a plugin denormal problem. Although denormals are usually less of a problem on AMD64. The 0(1024) in qjackctl I think means that JACK has reported 1024 xruns via the reporting API but they haven't been mentioned in the message log. I don't actually know what causes that. Does CPU usage (as reported by a plain old CPU usage reporting program) actually peak at that point? >> So my question is: Given my machine, should my CPU be topping out in >> this scenario ? > > Probably not, or at least I wouldn't expect it to suddenly peak if usage has previously been on the low side. The only thing RG does that may affect CPU usage drastically during playback is that it doesn't start running plugins until they actually have something to work on, and it stops running them if they've fallen silent for a certain period and have no more input coming up (this is in contrast to e.g. Ardour which runs plugins all the time during playback, taking a more strictly correct view). So, if anyone has anything to add to Chris's assessment, I'd like to know about it. If the problem is indeed related to denormals, is there a way to fix it ? Comments and suggestions are most welcome. Best, dp

18 years, 9 months

[linux-audio-dev] libtool test modules

by Stefano D'Angelo

Hi all, I have a little problem that maybe some of you already faced. I'm developing a test suite for my library and I wrote some libtool test modules which I wish to build with automake. The problem is that using check_LTLIBRARIES or noinst_LTLIBRARIES dynamic modules are not built, but only static libraries instead (while with any other prefix it works). How can I overcome this? Here the Makefile.am: MODFLAGS = "-module" INCLUDES = -I$(top_srcdir)/include @INCLTDL@ AM_CPPFLAGS = -DTESTSDIR=\"`pwd`\" TESTS = lists dynarrays dl check_PROGRAMS = $(TESTS) lists_LDADD = ../lib/libnasprocore.la dynarrays_LDADD = ../lib/libnasprocore.la dl_LDADD = ../lib/libnasprocore.la @LIBLTDL@ noinst_LTLIBRARIES = famod1.la goodmod.la famod1_la_SOURCES = famod1.c famod1_la_LDFLAGS = $(MODFLAGS) goodmod_la_SOURCES = goodmod.c goodmod_la_LDFLAGS = $(MODFLAGS) Thanks in advance, Stefano

18 years, 9 months

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