Linux-audio-dev March 2004

linux-audio-dev@lists.linuxaudio.org

73 participants
85 discussions

[linux-audio-dev] [simon@arrowtheory.com: [Portaudio] ANN: dsptools-0.4.0]

by Eric Dantan Rzewnicki

----- Forwarded message from Simon Burton <simon(a)arrowtheory.com> ----- Date: Thu, 25 Mar 2004 07:18:59 +1100 From: Simon Burton <simon(a)arrowtheory.com> Subject: [Portaudio] ANN: dsptools-0.4.0 To: portaudio(a)techweb.rfa.org X-Mailer: Sylpheed version 0.9.3 (GTK+ 1.2.10; i686-pc-linux-gnu) First public release. Comments sought. dsptools ======== Here be Python wrappers for portaudio, ladspa and libsndfile. There are three modules: ladspa, sndfile, and portaudio. They are independant of each other, ie. they should compile/run individualy. Data interchange is type sensitive and uses numarray arrays to store sound data. It's possible to segfault by doing stupid things, eg. from within the portaudio callback only some portaudio calls are allowed. See the python scripts for example usage, *.pyx files for implementation, and *.pxi for underlying c library info. http://sourceforge.net/projects/dsptools/ It's under tested, under documented, but it's pretty cool. Install ------- Use any of the setup scripts: $ python setup*.py build $ python setup*.py install Dependancies ------------ python 2.2.3 or better: http://www.python.org/ numarray 0.8.1 (or better): http://sourceforge.net/projects/numpy/ For portaudio module: portaudio v18.1 (not v19): http://www.portaudio.com/ For sndfile module: libsndfile 1.0.5 or better: http://www.mega-nerd.com/libsndfile/ For ladspa module: ladspa.h v1.1 : http://www.ladspa.org/ladspa_sdk/ and any plugins (optional): http://www.ladspa.org/ Todo ---- * Enable the writing of ladspa plugins in python (!) * portaudio v19 Related Projects ---------------- fastaudio, for portaudio & libsndfile : http://www.freenet.org.nz/python/pyPortAudio/ libsndfile-python : http://arcsin.org/archive/20030520025359.shtml Thanks to --------- Ross Bencina (portaudio) Erik de Castro Lopo (libsndfile) Greg Ewing and all the pyrex people ------------------------------------------------------------ Simon Burton March 23, 2004 -- Simon Burton, B.Sc. Licensed PO Box 8066 ANU Canberra 2601 Australia Ph. 61 02 6249 6940 http://arrowtheory.com _______________________________________________ Portaudio mailing list Portaudio(a)techweb.rfa.org http://techweb.rfa.org/mailman/listinfo/portaudio ----- End forwarded message -----

20 years, 1 month

[linux-audio-dev] [ann] pvoc-0.1.7

by Tim Goetze

the pvoc package is at 0.1.7, with piped I/O in the stretch utility rewritten for buffered operation, for a factor 2-3+ performance gain. (sic, stupid me called write() and read() for every sample. ah, don't you just love proof-of-concept code :) if you use the the stretch utility with piped I/O you really should upgrade. tim

20 years, 1 month

[linux-audio-dev] Generic audio file handling

by Steve Harris

Conrads announcement just reminded me, but a freind of mine sugessted this for Linux months ago (I think he nicked it off the way Amigas filetype-drivers did generic file i/o) and I've been meaning to post about it ever since. The Idea Have .so files (similar to LADSPA plugins, but different API) that contain functions that can be called to inspect audio files on disk to determine if they understand them or not. If they do a second function is called to stream the audio from the file (in a single standard format, eg. IEEE float or double). These .so files would just be thin wrappers over existing libraries, libsndfile, libfishsound, libFLAC etc. you could even wrap up General MIDI file renderers as an extreme example. The same could be done for writing, but thats probably less useful, and harder. The Motivation It means that if your app only cares about audio i/o a little it can have a single, simple .so file handling routine that scans the installed plugins offfering them all the file, pick one that recognises the filetype and asks it for the data. If you need anything complex - like extracting loop points from metadata streams then you will still have to use a library directly, but for simple "get me this audio" tasks this should be fine. Users can just install new plugins in a global directory and all the apps that use this scheme will then be able to read the new filetype. The API The functions would be something like: "get metadata" -- pass a fd, FILE * or filename and get back a struct describing the contents of the file (length, no. of channels etc.), or NULL if its not recognised by this plugin "get data" -- pass the file reference, some preallocated float buffers, and a frame count and they will be filled. returns how many frames were actually written I havent actually written any code, so you might need more API cruft than that, but this is the basic idea. - Steve

20 years, 1 month

[linux-audio-dev] [ann] pvoc-0.1.0, caps-0.1.11

by Tim Goetze

pleased to announce the new DSP package 'pvoc'. at its core, it features the CARL phase vocoder. there are three LADSPA units in this package (Exaggerate, Transpose, Accumulate) plus a commandline utility for time compression and expansion of n-channel audio data streams. compilation of this package will probably be an even rougher ride than with the initial release of caps (pvoc depends on FFTW3 and sndfile) but i'll be happy to help should you run into problems. http://quitte.de/dsp/pvoc.html ---------------------------------------------------------------------- in other news, the caps plugin collection has moved to version 0.1.11, with refinements pertaining to the amplifier emulation plugins and the SweepVF filter. http://quitte.de/dsp/caps.html as always, your feedback is welcome. enjoy, tim

20 years, 1 month

[linux-audio-dev] Some help with my BPM algorithm?

by Jay Dolan

Hello, I'm working on a simple command line driven bpm counter for mp3 files. It's very straight-forward. I'm trying to use a 4-beat phase shifting technique, but for some reason my code is returning the same exact value for each file. Obviously I have a stupid math error, or haven't thought things through enough. If someone wants to look at this and tell me what they think I did wrong, I'd appreciate it :) The code is pretty clean (just wrong) and well commented. You'll need to have mpg123 installed for it to (not) work. Thanks very much! ===== Jay Dolan Software Engineer, Systems Analyst Windmill Cycles, Inc. 508.999.4000 __________________________________ Do you Yahoo!? Yahoo! Finance Tax Center - File online. File on time. http://taxes.yahoo.com/filing.html

20 years, 1 month

[linux-audio-dev] Re: Software with source code?

by Juhana Sadeharju

>From: David Garcia Garzon <david.garcia(a)iua.upf.es> > >http://www.iua.upf.es/mtg/clam/ Thank you. The list has now 110+ software and still I have to download and verify 20-30. Graphics side has 130+ and more coming. I have also added urls pointing to the webpages. As I have actually downloaded the software during compiling the list, I have progressed slowly. BTW, downloading itself is becoming more difficult because of the scripted (php etc.) sites as shown in the examples below: % du -s 907336 innovation3d.sourceforge.net 703792 crystal.sourceforge.net 1039176 www.xiph.org Must be the duplicates which makes the most space. If I would be able to download the php database itself, it sure would take less space. Then I would set up here a php server and I could read the php databases with a browser. Regards, Juhana

20 years, 1 month

[linux-audio-dev] Software with source code?

by Juhana Sadeharju

Hello. I have partially lost the track on the latest audio and graphics development. Even I'm on 50+ mailing lists, the whole picture is blurry. So, I'm making a list of software which comes with source code. The list is intended more to developers who are looking for example codes, library codes, and projects to join. An unfinished list follows. The list format is simple: name and description. That is because one must be able to read the list through line-by-line without getting bored to details. Maybe later I will fill in the details: what re-usable gizmos the software have (filters, drawing algorithms, etc). Regards, Juhana Audio and graphics applications =============================== with source code for developers Audio ----- ac3filter AC3 decoder Alsa audio device drivers AlsaModularSynth (AMS) modular synth AlsaPlayer Anthem multitrack sequencer Aqsis Renderman renderer Ardour multitrack editor (and sequencer?) Audacity multitrack editor Audiality audiofile awesfx bacterium Brahms cdparanoia Cecilia graphical front end for Csound Csound modular synth Ecasound FluidSynth SoundFont synth gAlan modular synth gdam Glame gmorgan rhythm station, a pattern sequencer gmurf Gnomoradio a peer-to-peer music playing system Gramofile Horgand FM synth Hydrogen JACK JACK-Rack Jamin mastering tool Jazz jMax libsndfile mffmtimescale MusE multitrack audio and MIDI sequencer NoteEdit score editor OpenAL library for managing 3D spatialized audio devices OpenMusic PortAudio PureData (PD) Q/Q-Audio/Q-Midi Rezound Rosegarden multitrack audio and MIDI sequencer seq24 pattern sequencer solfege sooperlooper SoundFontCombi (SFC) MIDI router Specimen sampling synth SpiralLoop SpiralSynthModular (SSM) modular synth Supercollider Swami Sweep audio editor swh-plugins effect plugin collection tapiir TerminatorX TimeMachine timidity sampling synth with SoundFont support TSE3 sequencer engine (used by Anthem) ZynAddSubFX analog modelling synth CheeseTracker? LilyPond? Multitrack? Skale? SoundTracker? Ptolemy? Graphics -------- Ayam 3D modeller Aztec Blender CinePaint ClanLib 3D game library Coin 3D graphics library with Open Inventor API Crystal Space 3D game library dia Dore DRI Effectv ewave 3D modeller FOX toolkit for developing GUIs, with OpenGL widgets Freeman FreeType font rendering library GIMP Glade glaraocr Glide graphics library for 3Dfx Voodoo based cards gman gmone GNetLibrary GNUPlot scientific plotting gocr (jocr) Gozer text rendering library Imlib Impress imtools Innovation3D 3D modeller jpegsrc K3D 3D modeller kpovmodeler libart LibGLE OpenGL tubing and extrusion library LibGNetwork libgnomecanvas libpng LibSolid Mesa MeshIO library for loading 3D model files, 3DS format Nebuladevice MindsEye Moonlight Mops (ayam?) Ogre OpenEXR Open Inventor 3D graphics library OpenRM Open Scene Graph OpenSG Pango text rendering library Panorama Pixelize pixelizes an image using other images as pixels Pixie PLIB PLplot scientific plotting POV-Ray Prettypoly qcad Radiance Renderpark Rise SDL SGL SIPP polygon renderer Sketch smpeg Sodipodi SuperZoom tgif Threedom (3dom?) 3D modeller tiff UGS3D Vertex 3D modeller Vreng networked virtual 3D world engine VR Juggler VTK 3D visualization library, OpenGL based xcircuit circuit schematics drawing program xfig XFree86 Xine video player Xite xpdf XSane Matterial? Khoros? gSculpt? == end ==

20 years, 1 month

Re: Fwd: Re: [linux-audio-dev] Status of mLAN?

by Richard Bown

> > yamaha are willing to meet with us to discuss it. thats all the news > > that's fit to print. > > Several of us met with a guy from Yamaha's mLAN department at Sounds Expo > and he gave us the contact details ofr a guy in Japan who could provide > specifications and so on. I dont know who has them now. Me - I've traded a few emails with the Yamaha mLAN licencing manager and he's been promising to get us in touch with a guy at Rhodes University who's been working on mLAN driver support. Once I'd made contact with him I was going to pass the details onto Bob et al. Be good for us to get all of these contacts working together. R

20 years, 1 month

[linux-audio-dev] libfishsound-0.6.0

by Conrad Parker

Hey LADs, if you're looking for an easy way to add Ogg Vorbis and/or Speex support to your apps, check this out :) It's lightweight, callback based and uses per-channel float arrays by default (ie. the format preferred by JACK and LADSPA). It's fully documented, tested cross-platform, and includes examples for doing Ogg Vorbis and Speex decoding (~100 loc) and encoding (~110 loc). FishSound 0.6.0 Release ----------------------- libfishsound provides a simple programming interface for decoding and encoding audio data using Xiph.Org codecs (Vorbis and Speex). This release is available as a source tarball at: http://www.annodex.net/software/libfishsound/download/libfishsound-0.6.0.ta… libfishsound by itself is designed to handle raw codec streams from a lower level layer such as UDP datagrams. When these codecs are used in files, they are commonly encapsulated in Ogg to produce Ogg Vorbis and Speex files. libfishsound is a wrapper around the existing codec libraries and provides a consistent, higher-level programming interface. It has been designed for use in a wide variety of applications; it has no direct dependencies on Annodex or Ogg encapsulation, though it is most commonly used in conjunction with liboggz to decode or encode Ogg encapsulated Vorbis or Speex files. FishSound has been developed and tested on GNU/Linux, Darwin/MacOSX and Win32. It probably also works on other Unix-like systems via GNU autoconf. For Win32: nmake Makefiles, Visual Studio .NET 2003 solution files and Visual C++ 6.0 workspace files are all provided in the source distribution. Full documentation of the FishSound API, customization and installation, and complete examples of Ogg Vorbis and Speex decoding and encoding are provided in the source tarball, and can be read online at: http://www.annodex.net/software/libfishsound/html/ FishSound is Free Software, available under a BSD-style license. More information is available online at the FishSound homepage: http://www.annodex.net/software/libfishsound/ enjoy :) -- Conrad Parker Senior Software Engineer, Continuous Media Web, CSIRO Australia http://www.annodex.net/ http://www.ict.csiro.au/cmweb/

20 years, 1 month

[linux-audio-dev] [ANN] vsti v0.0.3

by Kjetil Svalastog Matheussen

http://www.notam02.no/arkiv/src/ SHORT DESCRIPTION Run a vsti plugin as a jack and alsa-seq client. HISTORY 0.0.2 -> 0.0.3 -Fixed stupid vsti init bug. Don't use v0.0.2, as it probably won't work. (Sorry) --

20 years, 1 month

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Linux-audio-dev March 2004