Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

7516 discussions

by Steve Harris

http://lv2plug.in/spec/ Some more work has been done recently, but I think I forgot to tell this mailing list. The most notable change is the inclusion of a port hint to indiciate that connections to that port are optional. This has never been a part of LADSPA, though it was discussed. It's included because it makes it possible to have plugin that can use certain port type extension, but dont require them. Eg. a plugin that can use MIDI data, but doesn't require it. If the plugin marks the MIDI port as lv2:optionalConnection then hosts can tell by inspection that it can still load and use the plugin, even if it doesn't support/want to use the MIDI extension. The LV2 spec is approaching finalisation now. We have two independent host impletmentions, and several that share some code, there are lots of plugins, some using extensions and some using vanialla LV2. If people want to comment opn the late drafts now would be a good time, as I imagine that the final spec will look a lot like whats there unless people find problems. - Steve

19 years, 3 months

[linux-audio-dev] [AN] QLoud-0.1 - measuring loudspeaker response

by Andrew Gaydenko

Hi! I have wrote this app for own audio-DIY use. Probably, somebody else will find the app useful too. I'll be happy in such case :-) Source: http://gaydenko.com/qloud/qloud-0.1.tar.bz2 Screenshot (180KB): http://gaydenko.com/qloud/shot01.png ===== README ====== QLoud is a tool to measure a loudspeaker frequency response. Writing this app is inspired by excellent applications written by Fons Adriaensen: http://users.skynet.be/solaris/linuxaudio/ Theoretical background belongs to Angelo Farina: http://pcfarina.eng.unipr.it/ In particular, this method was used: http://pcfarina.eng.unipr.it/Public/Papers/134-AES00.PDF Few hints: - move mouse above "?" sign at plot window and wait, - to delete measurement, use context menu on mesurements table, - to see what the app do, just connect app's JACK ports and try, - to see what your sound card do, use loopback for line in/out, - using "very smooth" fractional octave smoothing is hungry for CPU. So be patient when select more rather 1/3 octave smoothing (1/3 octave and less smoothing is rather interactive). Feedback: Please, add "QLoud" to your message subject. My email is: a(a)gaydenko.com ===== INSTALL ===== Requirements: - QT4 ( http://trolltech.com/ ), I use 4.1.4 version, - Qwt ( http://qwt.sourceforge.net/ ) from current CVS tree (probably, last official CVS qwt5 snapshot will work too), - JACK ( http://jackaudio.org/ ), - sndfile ( http://www.mega-nerd.com/libsndfile/ ), - fftw ( http://www.fftw.org/ ). Installation: - look in src/src.pro to modify include dirs if you want, - run qmake make 'qloud' excecutable will be in 'bin' directory.

19 years, 3 months

[linux-audio-dev] Are people still writing LADSPA plug-ins?

by Jono Bacon

Hi all, I don't mean this to be a pointed question, but from looking at the swh, TAP and CMT plug-in sites, there doesn't seem to be many recent updates of LADSPA plug-ins, and I have not seen many people releasing and announcing new plug-ins. Are people writing new plug-ins, and are existing plug-ins getting refined and released? It would awesome if there was a central site, akin to Firefox's Extension Room site, for the different plug-ins that are available. Jono

19 years, 3 months

[linux-audio-dev] Help needed: mpg123 lives!

by Nicholas J Humfrey

Hi, Thomas Orgis and myself have been doing some work on mpg123 and have started a website and Subversion repository: http://mpg123.orgis.org/ We have been rolling various patches into the new official code-base. We have gained permission from Michael Hipp and all the contributors to mpg123 to make all of the code LGPL licensed. New features: - autoconf/automake based build system - support for more output methods (liboa, JACK, SDL, PortAudio, CoreAudio) - more assembler optimizations (MMX, AltiVec, ...) - new equalizer code - experimental gapless playback We are working towards a 0.60 stable version. After that version we will be looking at more major changes to the code structure. I have been trying to add ALSA 0.9/1.0 API support - but have been having a few problems - is anyone able to help out? Thanks, nick.

19 years, 3 months

[linux-audio-dev] Re: Akai's MPC4000 Sampler/Workstation Open Source Project

by Juhana Sadeharju

>From: Renich Bon ?iri? <renich(a)woralelandia.com> > And what you wanted to say? The mail had no content. Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software

19 years, 3 months

[linux-audio-dev] C++ wrapper for libsndfile

by Erik de Castro Lopo

Hi all, Thanks to suggestions from people here I now have a relatively complete C++ wrapper for libsndfile: http://www.mega-nerd.com/tmp/sndfile.hh There is also a pre-release of libsndfile which includes a test for this wrapper: http://www.mega-nerd.com/tmp/libsndfile-1.0.17pre7.tar.gz C++ users, please comment. Cheers, Erik -- +-----------------------------------------------------------+ Erik de Castro Lopo +-----------------------------------------------------------+ "Even among Europe's Muslim minorities, roughly one-in-seven in France, Spain, and Great Britain feel that suicide bombings against civilian targets can at least sometimes be justified to defend Islam against its enemies." -- http://pewglobal.org/reports/display.php?ReportID=253

19 years, 3 months

[linux-audio-dev] [ANN] das_watchdog V0.2.4 and jack_capture V0.3.7

by kjetil＠ccrma.stanford.edu

New source location: http://www.notam02.no/~kjetism/src/ (Sorry, I have temporarily lost access to both my previously used upload directories) das_watchdog ************************************************************************* Whenever a program locks up the machine, das_watchdog will temporarily sets all realtime process to non-realtime for 8 seconds. You will get an xmessage window up on the screen whenever that happens. Changes 0.2.3->0.2.4 -------------------- *Test if the xmessage program found during the make process is a valid executable. If not, search the $PATH instead. This should fix it for Gentoo when the pro-audio overlay is updated to at least this version. *Various modifications for the High Res Timer, which should be used instead of setting the timer interrupt process to SCHED_FIFO/99. jack_capture ************************************************************************* jack_capture is a small program to capture whatever sound is going out to your speakers into a file without having to patch jack connections, fiddle around with fileformats, or set options on the argument line. This is the program I always wanted to have for jack, but no one made. So here it is. Changes 0.3.1 -> 0.3.7: ----------------------- *Fixed potentional buffer underrun error. *Fixed potentional ringbuffer size allocation miscalculation. *Better way to set leading zeros in filename. Thanks to Melanie. *Better underrun handling. Thanks to Dmitry Baikov. *Added support for jack buffer size change. *Removed some unnecessary code and comments *Beautified code a bit. *Fixed a bug in the reconnection code. *Beautified code a lot. *Changed bufsize argument to accept seconds instead of frames. Default buffer size is 60 seconds. *Improved documentation and help option. *Beautified source a bit. *Fixed bug in ringbuffer size allocation. *Fixed so that more than one instance of jack_capture can run at once.

19 years, 3 months

[linux-audio-dev] light C++ set for WAV

by Andrew Gaydenko

I mean some minimal C++ class set like: WavFile, WavHeader, WavFrame with few apparent methods (open/close, read/write frame(s)). Suggestions?

19 years, 3 months

[linux-audio-dev] Popular LADSPA plug-ins to depend on?

by Jono Bacon

Hi all, I am working on LADSPA support in Jokosher and we want Jokosher to depend on particular plug-ins in different parts of the application. Specifically, I would like to see a powerful compressor and equalizer as part of the application. So, my question to you all is which compressor and equalizer do we depend on? Importantly, the chosen plug-ins need to exhibit the following qualities: * packages for all major distributions (Ubuntu, Debian, Red Hat, Fedora, Gentoo, SuSE etc.) * well maintained * very high quality audio quality Cheers, Jono

19 years, 3 months

[linux-audio-dev] Basic MIDI question

by Lee Revell

I've never been a MIDI expert but I'm now having to learn. I have a question about this excerpt of a MIDI file viewed with hexedit. 00001BB0 22 80 3D 35 31 80 3A 39 0E 80 37 31 03 80 31 1F ".=51.:9..71..1. 00001BC0 81 0C 90 30 5B 00 90 3C 79 81 70 90 39 73 00 90 ...0[..<y.p.9s.. 00001BD0 36 69 4B 80 36 43 0A 80 3C 26 01 80 30 44 0A 80 6iK.6C..<&..0D.. 00001BE0 39 42 82 08 90 37 63 00 90 43 7B 81 70 90 3E 5E 9B...7c..C{.p.>^ 00001BF0 00 90 3A 66 08 80 37 30 02 80 43 32 31 80 3E 11 ..:f..70..C21.> Take the sequence "80 3D 35 31 80 3A 39 0E 80 37 31 03 80 31 1F" in the first line for example. I know that 0x80 is note-off, and 0x3D are note number and 0x35 the velocity of the note-off. But what the heck is the next byte, 0x31? The MIDI standard says note-off is one status byte followed by 2 data bytes! Lee

19 years, 3 months

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

Linux-audio-dev