Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

7516 discussions

by Jeff McClintock

> Since LADSPA does not specifiy that control values are valid at > activate(), either As a host developer, I'd like to explain why control values are not valid at activate(). Imagine a modular plugin system which allows chaining of control signals. Assume all plugins are activated before any is run... [A]-->[B]-> 'A's control outputs might depend on it's audio input. i.e. 'A' can't send control signals until run() is called. Given that, 'B's input ports can't ever be valid during activate. Best to not access control values during activate. Perhaps helpful if hosts never provide them... to encourage plugin developers to write robust code ;) Jeff

18 years, 4 months

[ANN] Free Music Instrument Tuner 0.97.6 released

by Gilles Degottex

Hi all, * new Statistic module, look at the screenshots page and guess :) http://home.gna.org/fmit/ss.html * bug fix for JACK Website: http://home.gna.org/fmit Download: http://download.gna.org/fmit Donation page: http://home.gna.org/fmit/donation.html Comments, remarks, tests, bug reports and rotten tomatoes are always welcome. Have fun, Best Regards, Gilles

18 years, 4 months

Re: [LAD] Source code for Open Sound System now available under GPLv2 and CDDL 1.0

by Pedro Lopez-Cabanillas

On Thursday, 14 June 2007 00:41, pete shorthose wrote: > On Thu, 2007-06-14 at 00:42 +0300, Hannu Savolainen wrote: > > Hi folks, > > > > Now it has happened. Open Sound System is finally open sourced. > > http://4front-tech.com/hannublog/?p=5 Quote1: "However the ALSA API is still almost completely undocumented (after three years of it’s release) so how can anybody expect that programmers could develop good applications based on it." Quote2: "For the above reasons the benefits of OSS are widely ignored: [...] * It’s fully documented (OTOH some parts of the documentation are still under construction)." Yeah. The ALSA API is also fully documented, but some parts are still in a work in progress state... What happened to MIDI/sequencer? http://4front-tech.com/hannublog/?p=6 Quote3: "The real problems started few months after that when I tried to document the sequencer/music interface. [...] Due to lack of time I gave up but promised to write the documentation later." Quote4: "The bad news is that there is no MIDI support in OSS 4.0. There are few bugs in the MIDI code and we decided to ship OSS 4.0 without it [...] MIDI support will be included in OSS 4.1 (hopefully within this year)." OK, lets talk about MIDI after some months. Regards, Pedro

18 years, 4 months

Traverso 0.40.0 Released

by Remon

Traverso 0.40.0 Release Announcement The Traverso development team is pleased to announce the release of Traverso 0.40.0 Traverso is a cross platform multitrack audio recording and editing suite with a clean and innovative interface targeted for home and professional use. Changes in this release: * Completely revamped User Interface, with many usability enhancements which is fully themeable. * Improved input event handler, with many new options * CD TOC creation, with integrated CD Burning facilities. * Support for LV2 plugins * Reduced memory footprint for large projects * Ported to Windows and Mac OS X * Command Plugin framework: Extend Traverso's functionality by writing new Commands. Source tarball and installers for Linux, Mac OS X and Windows are available at: http://traverso-daw.org/ Enjoy! The Traverso team.

18 years, 4 months

Re: [LAD] Controller images

by pete

Christian <krampenschiesser@email-addr-hidden> wrote: > Thanks! > This is what I meant, but this control is useless for me. > But I found a way to create this in GIMP. > I made a circle and cutted it to a controller. Now I could select > small > parts of it and set all black colors to red( with > scriptfu->colors->color convert ). > It was a lot of work, but worthy! > so this is what I use right now: > http://www.krampenschiesser.de/screenshots/ksdrumgui.jpg just to be clear, phat uses the rendered output of my animated version of Thorsten Wilms' knob mesh. (i had no creative input at all, i just made Thorsten's mesh move) blender creates a sequence of knob sized frames (with an alpha channel, should that be desired) then, the image magick tool "convert" is used (eg "convert +append output.png *.png" to concatenate the frames into a large single image which can be easily loaded and manipulated programatically. (as is done in the phat knob and numerous other pixmap knobs derived from the galan C code) the method is independent of the code you use so there's no reason why it shouldn't be useful to you. in fact, it's so simple that i've duplicated your red knob design. see here for the blender (.blend) file: http://www.zenadsl6252.zen.co.uk/flat-red-100-frames.blend and here for the output: http://www.zenadsl6252.zen.co.uk/flat-red-100-frames.png it's trivial to change the number of frames, the colours used or the frame size and re-render it. you can also adjust the output filter to sharpen or soften the edges. i must admit though, that with a minimal design like this, you might do well to implement it algorithmically with drawing operations. then you can make run time changes to the appearance. if you want something more complex or tactile then you could use Thorsten's knob animation or give me a shout and i'll knock something out to your specs. (although, bear in mind that my blender skills are somewhat limited so it won't be a work of art =) pete.

18 years, 4 months

Source code for Open Sound System now available under GPLv2 and CDDL 1.0

by Hannu Savolainen

Hi folks, Now it has happened. Open Sound System is finally open sourced. Source downloads are available from http://developer.opensound.com/sources The actual announcement follows. Best regards, Hannu ------------------------------------------------------------------ FOR IMMEDIATE RELEASE 4FRONT TECHNOLOGIES RELEASES THE SOURCE CODE FOR OPEN SOUND SYSTEM CULVER CITY, CA, June 14, 2007: 4Front Technologies is proud to announce the release of the source code to Open Sound System (OSS) v4.0. The software currently runs on Linux, Solaris™, SCO UnixWare™ and FreeBSD platforms. OSS is a cross platform API that provides drivers for most consumer and professional audio devices for UNIX® and POSIX based operating systems, including Linux. Owing to its open architecture, applications developed on one supporting operating system platform can be easily recompiled on any other platform. Licensing Models: Open Sound System source code is now available under 3 licenses: · GNU Public License (GPL) version 2 · Common Development and Distribution License (CDDL) for all operating systems that have full source code available under the BSD or CDDL licenses. · 4Front’s commercial license for using Open Sound incompatible with open source licenses listed above. Commercial licenses are also available for entities not wishing to use Open Sound System under any of the above open source licenses What is being open sourced? The source code includes drivers for most consumer PCI and USB audio devices and operating system support, including binary package generation and sample test programs. Complete documentation and API specification is also being made available to the open source community. A device driver kit (DDK) is also available for developers to implement cross platform device drivers for audio hardware. This eliminates lot of redundant work that has traditionally been required to support any hardware under multiple Unix/POSIX operating systems. Reasons for going Open Source: OSS has been an open API specification with multiple implementations by independent developer communities. This has caused problems for application designers because there are minor differences between the implementations. The new open source community development model makes it possible to replace the obsolete and incompatible vendor specific sound subsystems and OSS implementations with a state-of-the-art implementation developed by 4Front Technologies. The goal has always been to standardize audio under POSIX compliant systems and this includes real time operating systems and embedded systems as well. "We are open sourcing OSS because this provides a great opportunity for different communities to work together to provide wider audio hardware support for all operating systems." said Hannu Savolainen, CTO and chief architect of Open Sound System. Industry Reaction: "It's great to see 4Front releasing OSS under the Common Development and Distribution License (CDDL). It's something the OpenSolaris™community welcomes, and it provides an opportunity to improve sound support for all OpenSolaris™ distributions," says Stephen Lau, OpenSolaris™ board member. "Fluendo is excited to see the open source release of 4Front Technologies advanced OSS implementation for UNIX® and Linux. Getting a unified and advanced sound system across all major UNIX® and Linux variants will be a big advantage for developers. We look forward to working together with 4Front Technologies to make sure the GStreamer multimedia framework and the Open Sound System integrates perfectly with each other", says Fluendo Business Development Manager Christian F.K. Schaller. "With a long history of successful collaboration with 4Front, Creative looks forward to working with the Open Sound System community in ensuring that Creative Sound Blaster Live! and Sound Blaster Audigy sound cards have stable and well-supported drivers on Linux, Solaris and BSD. The open source release of Open Sound certainly helps our goal in providing cross-platform support for our products," said George Thorn, director of digital media relations for Creative Labs. Community Portal A new web site with source code, API specs and forums for the developer community has been opened at http://developer.opensound.com <http://developer.opensound.com/>. For more information and to download the binary distributions of Open Sound System, visit 4Front's WWW site at http://www.opensound.com <http://www.opensound.com/>. --- xxx --- All trademarks and copyrights belong to their respective owners. UNIX is a registered trademark in the United States and other countries, exclusively licensed through X/Open Company, Ltd. Sun, Solaris, OpenSolaris, Sun Microsystems and The Network Is The Computer are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries. Open Sound System is a trademark of 4Front Technologies. Copyright (C) 1996-2007, 4Front Technologies, All Rights Reserved. Contact: Dev Mazumdar 4Front Technologies 4035 Lafayette Place, Unit F Culver City, CA 90232 USA. Tel: (310) 202 8530 E-mail: info(a)opensound.com <mailto:info@opensound.com> Fax: (310) 202 0486 Web: http://www.opensound.com <http://www.opensound.com/>

18 years, 4 months

audio codec

by Vedran Vucic

Dear colleagues, I got in touch with people from teh Institute for Solar and Terrestrial Physics from Irkutsk, Russia who wrote audio codec. Please check site www.true-audio.com Developers from that institute are willing to cooperate with a variety of Linux audio users and developers who are willing to work further on the development of that codec, testing and dissemination. please contact me if you are willing to join that effort and if you can see place of that codec iin your applications, hardware, projects. With best wishes, Vedran Vucic Linux Center http://www.gnulinuxcentar.org

18 years, 4 months

[ANN] AlsaPlayer 0.99.80-rc1 and FftScope 1.0.5

by Dominique Michel

I am very proud to announce 2 new releases: alsaplayer-0.99.80-rc1 and fftscope-1.0.5 The main added feature in those 2 packages is a new GTK2 interface. I must thank Madej. He done most of the job and is still working to improve it. Alsaplayer-0.99.80-rc1 ---------------------- AlsaPlayer is a new type of PCM player. It is heavily multi-threaded and tries to excercise the ALSA library and driver quite a bit. It has some very interesting features unique to Linux/Unix players. This is a major feature enhancement release. The player has now a fully working GTK2 interface. It includes the same functionality as the GTK1 interface and some new functions. The playlist window has been completely rewritten and is inside the main window. The scopes plugins have been migrated too. A lot of debugging has been made. Every user is encouraged to upgrade AlsaPlayer and use the GTK2 interface. We need your help with a few things: * Bug reports * Feature requests * Artwork contributions fftscope 1.0.5 -------------- Fftscope is a nice fft scope plugin for Alsaplayer. It is now 2 versions of this scope in the package: one with GTK1 interface, the other with GTK2 interface. This is a major feature enhancement release Enjoy those 2 new releases! --------------------------- http://www.alsaplayer.org/ http://sourceforge.net/project/showfiles.php?group_id=249 Dominique

18 years, 4 months

CLAM 1.1, The `More eye-candy, please' release.

by Pau Arumi

CLAM 1.1, The `More eye-candy, please' release. After a very intense development months since the last 1.0 release, the CLAM crew is glad to announce that CLAM 1.1 is ready to [1]download. It comes with many new features and code clean up. Most important improvements are found in the Visual Prototyping front: new 3D-looking widgets, new data viewers and control surface; and a simplified way to bind controls between the user interface and the processing network. To learn about CLAM: http://clam.iua.upf.edu This release has been cooked-up under the umbrella of the Interactive Technology Group at the UPF lead by Josep Blat. So we thank their support! It also features the work from contributors such as Zach Welch; as well as the first patches from [2]Google Summer of Code program --for example LADSPA and FAUST support and some work on Annotator widgets. A summarized list of changes follows. See also the [3]CHANGES files for details. New audio related widgets were added to be used on the NetworkEditor and the Prototyper. Such widgets include data views such as the BarGraph which can display LPC's, MFCC's. Nice control widgets were also added. The ControlSurface, for instance, to control two scalar parameters by moving a point. Some widgets were gathered from the LAC community, such as [4]PkSampler [5]PovRay generated widgets, and nice knobs we enhanced from [6]QSynth and [7]Rosegarden. Thanks to the developers of those projects for making them GPL and being so supportive while integrating them in CLAM. With all those widgets, users now can visually build more appealing applications such as the new examples we include with Prototyper: A real-time gender change, or real-time spectral effects. The TonalAnalysis (Chord extraction) now takes advantage of fftw3 performing 4 times faster! The KeySpace visualization was also optimized so now tonal analysis runs even on very slow computers. NetworkEditor and Prototyper usability have been enhanced. They exploit the new in-control bounds parameters to automatically set up bounded control senders widgets. Also, NetworkEditor have proper multi-processing selection features. On different fronts, the code-base has been reduced by getting rid of Fltk and Qt3 modules since we are now focusing on Qt4, and the documentation have been restructured and now it offers new programming how-tos. The CLAM team References 1. http://clam.iua.upf.edu/download.html 2. http://clam.iua.upf.edu/wikis/clam/index.php/GSoC_2007 3. http://clam.iua.upf.edu/doc.html#changes 4. http://www.patrickkidd.com/ 5. http://www.povray.org/ 6. http://qsynth.sourceforge.net/ 7. http://www.rosegardenmusic.com/

18 years, 4 months

pipe/cond/semaphore/etc benchmarks

by Dave Robillard

Hi all, I remember a while back someone posting results of a benchmark to compare performance of pipes vs cond vs semaphores, but I can't find the specific post or code in the archives for the life of me. Does anyone have the /code/ for that benchmark (or anything similar I can fiddle with to do some testing)? Thanks, -DR-

18 years, 4 months

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Linux-audio-dev