Linux-audio-dev

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7513 discussions

by Hans Fugal

ladspar is a Ruby module for using LADSPA plugins. Here's a short example: --- require 'ladspa' require 'narray' # load the CMT library cmt = LADSPA.load_library('cmt') # get an instance of the amp_mono plugin amp_mono = cmt.plugins.find {|p| p.label == 'amp_mono'}.instantiate(44100) # The ports are Gain, Input, and Output. amp_mono.ports[0].connect_port(1.5) # gain input = NArray.sfloat(44100) amp_mono.ports[1].connect_port(input) output = NArray.sfloat(44100) amp_mono.ports[2].connect_port(output) amp_mono.activate if amp_mono.has_activate # prep the input data ... amp_mono.run amp_mono.deactivate if amp_mono.has_deactivate amp_mono.cleanup --- This is the first release of ladspar; I consider it beta quality. I have put it through its paces (more test code than swig code), but I am the only one to have tested it. Nevertheless I think it is usable, and I am eager to fix any bugs you may find. Go grab it at http://rubyforge.org/projects/ladspar -- .O. Hans Fugal | De gustibus non disputandum est. ..O http://hans.fugal.net | Debian, vim, mutt, ruby, text, gpg OOO | WindowMaker, gaim, UTF-8, RISC, JS Bach --------------------------------------------------------------------- GnuPG Fingerprint: 6940 87C5 6610 567F 1E95 CB5E FC98 E8CD E0AA D460

21 years, 1 month

[linux-audio-dev] Re: OSC for GUI-Engine communication

by Juhana Sadeharju

>From: Dave Robillard <drobilla(a)connect.carleton.ca> > >The question is, which implementation is best? All I can find is >Steve's liblo, libosc++, and the 'official' OSC kit. What are the >advantages/drawbacks of each? I can find very little information on any >of them. Last I checked OSC, it had Lisp/Scheme like syntax. Don't know if that is a drawback --- anyone? Has anyone used MPI (Message Passing Interface) for this? People use these for high performance parallel computations in Linux clusters. MPI itself is a standard supported by academic and by vendors. MPI is used, e.g., in supercomputers. See, e.g., http://www.csc.fi/reports/pc-cluster/Finalreport.pdf Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software

21 years, 1 month

Re: [linux-audio-dev] LADSPA "Unique" IDs

by Taybin Rutkin

This bit ardour a little while ago when one plugin author changed the number or ordering of their ports without changing the ID number. Taybin -----Original Message----- From: Steve Harris <S.W.Harris(a)ecs.soton.ac.uk> Sent: Jul 29, 2004 4:00 AM To: The Linux Audio Developers' Mailing List <linux-audio-dev(a)music.columbia.edu> Subject: Re: [linux-audio-dev] LADSPA "Unique" IDs On Thu, Jul 29, 2004 at 09:17:03AM +0100, Chris Cannam wrote: > On Thursday 29 Jul 2004 12:42 am, Dave Robillard wrote: > > I vaguely remember a discussion here about LADSPA ID's (unsigned > > long UniqueID) not actually being globally unique to a plugin like > > the header implies, but I can't find it in the archives. > > > > So.. unique or not? Basically I need to know what the "proper" > > information is to send a synth in order to load a plugin. > > The outcome was that (i) LADSPA _does_ appear to specify that the > unique ID should be globally unique, but (ii) it's not in practice > easy to guarantee that, for generated or wrapper plugins (e.g. a vst > wrapper that doesn't know how many plugins will be in the .so until > it's counted your VSTs), and (iii) some plugin developers (Steve!) > thought the LADSPA docs said differently anyway, so it's possible > they may have made plugins with duplicate IDs. Personally I've only done that by accident! But it has happened. My buil process now has a bozosity checker run, that looks for silly mistakes, like two plugins with the same ID. I do learn eventually :) > /* This identifier can be used as a unique, case-sensitive > identifier for the plugin type within the plugin file. Plugin > types should be identified by file and label rather than by index > or plugin name, which may be changed in new plugin > versions. Labels must not contain white-space characters. */ > > To me this makes it pretty plain that filename and label is at least > intended to be a valid unique ID within your filesystem, and in > practice I'd expect it to be an effective id for the plugin anywhere > in the world. I think it should be: local filenames are unique, and labels are required to be unique in the file. A problems with using UIDs for this kind of thing is that they dont have to change with plugin versions, so you can end up with two plugins iwth the same ID and ports, but different paths nad different effects/bugs, and you dont know which one to load. > One problem is that there seems to be an informal understanding that > if you change the port specifications for a plugin you should also > change its unique ID, but I don't think there's any such > understanding for labels, so you don't have the reassurance of > knowing you're using the version you actually intended. All this and more :) - Steve

21 years, 1 month

[linux-audio-dev] Perl / Audio::LADSPA lib

by Joost Diepenmaat

Hello everybody, At http://hortus-mechanicus.net/perl/audio-ladspa/ you can find my attempts at making a LADSPA interface for Perl. The LADSPA API should be completely supported, but at the moment the system only supports mono audio out (via Audio::Play) and no way of reading/writing audio files. There is also a crude GUI at: http://hortus-mechanicus.net/perl/audio-ladspa/rack.perl.txt To use the GUI you need to have perl-tk installed. Bugreports / missing features welcome. Joost Diepenmaat. --- README follows --- Audio::LADSPA ============== This is a set of extensions to host LADSPA plugins, you can query them, or apply them to audio data. INSTALLATION To install this module type the following: perl Makefile.PL make make test make install Or, if you prefer the CPAN installer, type: perl -MCPAN -e'install Audio::LADSPA' Which will fetch, make and install the module for you. DEPENDENCIES LADSPA dependencies: The tests specifically need the demo plugins from the ladspa_sdk package, with LADSPA_PATH pointing to the directory where they are installed. You do not have to set the LADSPA_PATH environment variable if your LADSPA plugins are located in either /usr/lib/ladspa or /usr/local/lib/ladspa, but you will be warned when the modules are loaded. You'll probably want to set it anyway, because most other LADSPA hosts need it. You can download the sdk from from http://www.ladspa.org/ Debian users can use "apt-get install ladspa-sdk" Alternatively, you can skip the tests, but these modules are of no use without at least SOME plugins installed. CPAN dependencies: Also, this extension requires the following Perl modules; Test::More, Audio::Play, Scalar::Util, Data::Uniqid and Graph::Directed Install them first from CPAN. Alternatively, if you're installing using the CPAN or CPANPLUS shell, this can be taken care of automatically. COPYRIGHT AND LICENCE Copyright (C) 2003 - 2004 Joost Diepenmaat This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the COPYING file for more information

21 years, 1 month

[linux-audio-dev] LADSPA "Unique" IDs

by Dave Robillard

I vaguely remember a discussion here about LADSPA ID's (unsigned long UniqueID) not actually being globally unique to a plugin like the header implies, but I can't find it in the archives. So.. unique or not? Basically I need to know what the "proper" information is to send a synth in order to load a plugin. At the moment I'm sending filename and index, which I don't think is ideal. (The synth could be running on a completely seperate machine, so the sender and receiver might not have the same LADSPA plugins around...) Thanks, -DR-

21 years, 1 month

[linux-audio-dev] noiseweapon 1.0

by Dave Griffiths

Hi all, Thought I'd better get round to releasing this at last: The noiseweapon is a multitimbral, polyphonic synth that I use for live performance: http://www.pawfal.org/Software/noiseweapon/ have fun, dave

21 years, 1 month

[linux-audio-dev] errors building midishare

by Ciccolella Lazzaro Nicolò

hi, for being able to try the linux port of mythical ircams "open music" I trying to compile from source (CVS) the grams "midishare" unfortunately, with some build errors. My box: slackware 9.1/current, kernel 2.6.6, gcc 3.3.3 every aid is a lot appreciated Lazzaro Follow the errors: make[1]: Entering directory `/opt/sources/midi/midishare/linux-dev/midishare-linux/linux/kernel' gcc -O6 -Wall -D_LOOSE_KERNEL_NAMES -DMODVERSIONS -D__Pentium__ -DCONFIG_KERNELD -DMODULE -D__KERNEL__ -DLINUX -I/lib/mod ules/`uname -r`/build/include/ -I../../common/Headers -c -o msLoader.o msLoader.c In file included from /lib/modules/2.6.6/build/include/asm/processor.h:18, from /lib/modules/2.6.6/build/include/asm/thread_info.h:16, from /lib/modules/2.6.6/build/include/linux/thread_info.h:21, from /lib/modules/2.6.6/build/include/linux/spinlock.h:12, from /lib/modules/2.6.6/build/include/linux/capability.h:45, from /lib/modules/2.6.6/build/include/linux/sched.h:7, from /lib/modules/2.6.6/build/include/linux/module.h:10, from msLoader.c:41: /lib/modules/2.6.6/build/include/asm/system.h: In function `__set_64bit_var': /lib/modules/2.6.6/build/include/asm/system.h:193: warning: dereferencing type-punned pointer will break strict-aliasing r ules /lib/modules/2.6.6/build/include/asm/system.h:193: warning: dereferencing type-punned pointer will break strict-aliasing r ules msLoader.c: In function `prnt': msLoader.c:79: error: structure has no member named `tty' msLoader.c:84: error: request for member `write' in something not a structure or union msLoader.c:85: error: request for member `write' in something not a structure or union msLoader.c: In function `MidiReset': msLoader.c:130: warning: `MOD_DEC_USE_COUNT' is deprecated (declared at /lib/modules/2.6.6/build/include/linux/module.h:51 3) msLoader.c: In function `myopen': msLoader.c:141: warning: `MOD_INC_USE_COUNT' is deprecated (declared at /lib/modules/2.6.6/build/include/linux/module.h:50 1) msLoader.c: In function `myclose': msLoader.c:150: warning: `MOD_DEC_USE_COUNT' is deprecated (declared at /lib/modules/2.6.6/build/include/linux/module.h:51 3) make[1]: *** [msLoader.o] Error 1 make[1]: Leaving directory `/opt/sources/midi/midishare/linux-dev/midishare-linux/linux/kernel' make: *** [kernel] Error 2

21 years, 1 month

[linux-audio-dev] ladspar

by Hans Fugal

I've been putting together a library for using LADSPA plugins in Ruby. I think it's code-complete, and could use some early beta testers while I finish packaging it up. If you know ruby and LADSPA and would like to look at it send me an email off-list and I'll send you a tarball. I anticipate a first release later this week. -- .O. Hans Fugal | De gustibus non disputandum est. ..O http://hans.fugal.net | Debian, vim, mutt, ruby, text, gpg OOO | WindowMaker, gaim, UTF-8, RISC, JS Bach --------------------------------------------------------------------- GnuPG Fingerprint: 6940 87C5 6610 567F 1E95 CB5E FC98 E8CD E0AA D460

21 years, 1 month

[linux-audio-dev] Re: wavelet sampling

by Juhana Sadeharju

>From: "Susan R. Cragin" <susancragin(a)earthlink.net> > >Can anyone send me to a web site describing wavelet sampling as it >applies to speech recognition? Probably best would be to search at ACM and IEEE digital libraries. But google can bring up good papers too. http://www.wavelet.org should be worth of looking at. They publish a digest having research notifications. Juhana

21 years, 1 month

[linux-audio-dev] FSMSI 2004 Proceedings (slides and audio recordings) available

by Media Innovation Unit - Firenze Tecnologia

====================================================================== FSMSI 2004 European seminar on "Free Software for Multimedia Streaming over the Internet" June 23/24, 2004 IRCAM, Paris, France http://freesoftware.ircam.fr/fsmsi2004 FSMSI 2004 PROCEEDINGS (SLIDES AND AUDIO RECORDINGS) AVAILABLE ====================================================================== SCOPE OF THE SEMINAR The exponential growth of network speed makes it possible to exchange high quality audio and video contents over the Internet, often with real time capabilities. However, multimedia streaming still presents several issues with regards to Free Software and open standards: patents on software and data formats, free codecs availability, standards definitions, etc, etc. The goal of this seminar is to provide an overview of existing Free Software for multimedia streaming over Internet, to envisage future developments and collaborations in this area and to examine the possible ways to fund these developments. PROCEEDINGS AVAILABLE All the proceeding for the first edition of FSMSI, which took place at IRCAM (Paris), with the participation of Carlo Calabrò (Videolan), François Déchelle (Ircam), Dominique Fober (Grame), Andrea Glorioso (MIU-FT), Eric Gressier (Cnam), Olivier Lescurieux (Ircam), Hans-Nikolas Locher (Cnam), Juan Carlos De Martin (IEIIT-CNR/Politecnico di Torino), Yann Orlarey (Grame), Stuart Cunningham (BBC R&D) and Anuradha Suraparaju (BBC R&D) as speakers, are now available online at: http://freesoftware.ircam.fr/rubrique.php3?id_rubrique=83 You will find both the presentations' slides [S] and (most of) the audio recordings [A] here: - Francois Dechelle: Introduction [S] http://freesoftware.ircam.fr/misc/fsmsi2004/slides/francois.dechelle.pdf - Andrea Glorioso: "Innovating the Media: why Streaming is important for Free Software (and viceversa)" [S] http://freesoftware.ircam.fr/misc/fsmsi2004/slides/andrea.glorioso.pdf - Carlo Calabro`, Simon Latapie: "The VideoLAN project" [S] http://freesoftware.ircam.fr/misc/fsmsi2004/slides/carlo.calabro.simon.lata… [A] http://freesoftware.ircam.fr/misc/fsmsi2004/recordings/carlocalabro-videola… - Eric Gressier: "The distributed concert" [S] http://freesoftware.ircam.fr/misc/fsmsi2004/slides/eric.gressier.pdf [A] http://freesoftware.ircam.fr/misc/fsmsi2004/recordings/ericgressier-thedist… - Dominique Fober: "Clock skew in real-time networking" [S] http://freesoftware.ircam.fr/misc/fsmsi2004/slides/dominique.fober.clock-sk… [A] http://freesoftware.ircam.fr/misc/fsmsi2004/recordings/dominiquefober-wirel… - Dominique Fober: "Wireless performance in regard of music applications" [S] http://freesoftware.ircam.fr/misc/fsmsi2004/slides/dominique.fober.wireless… [A] http://freesoftware.ircam.fr/misc/fsmsi2004/recordings/dominiquefober-wirel… - Yann Orlarey: "Distant Music Rehearsal" [S] http://freesoftware.ircam.fr/misc/fsmsi2004/slides/dominique.fober.wireless… [A] http://freesoftware.ircam.fr/misc/fsmsi2004/recordings/Distant_Music_Rehear… - Juan Carlos de Martin: "The Open Media Streaming project" [S] http://freesoftware.ircam.fr/misc/fsmsi2004/slides/dominique.fober.wireless… [A] http://freesoftware.ircam.fr/misc/fsmsi2004/recordings/THe_Open_Media_Strea… - Stuart Cunningham, Anuradha Suraparaju: "BBC Research and Development multimedia projects" [S] http://freesoftware.ircam.fr/misc/fsmsi2004/slides/stuart.cunningham.anurad… [A] http://freesoftware.ircam.fr/misc/fsmsi2004/recordings/BBC_Research_And_Dev… The organization committee of FSMSI 2004, namely Andrea Glorioso (MIU-FT) and Francois Déchelle (IRCAM) would like to thank all the speakers and the participants to the conference, for making it such a useful and nice experience; to Patrice Tisserand and Simon Schampijer (IRCAM) for their valuable help; to Nicola Giosmin and Linda Salvadori (MIU-FT) for their organizational support from Italy. CONTACTS Web site: http://freesoftware.ircam.fr/fsmsi2004/ Mailing list: freestreaming-paris2004(a)lists.miu-ft.org http://lists.miu-ft.org/mailman/listinfo/freestreaming-paris2004 Organizational Committe: Andrea Glorioso <a.glorioso(a)miu.firenzetecnologia.it> Francois Déchelle <Francois.Dechelle(a)ircam.fr>

21 years, 1 month

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Linux-audio-dev