Linux-audio-dev March 2003

linux-audio-dev@lists.linuxaudio.org

88 participants
102 discussions

[linux-audio-dev] ANN: swh-plugins 0.3.7

by Steve Harris

http://plugin.org.uk/releases/0.3.7/ I've done a major code audit (with the help of valgrind :), and things are a lot less crufty now. There are still some outstanding known sound quality/noise/aliasing bugs, I'l tackle them in the next release, but I'd appreciate more reports. ChangeLog: 2003-02-23 Steve Harris <steve(a)plugin.org.uk> * Fixed memory leak in gate * Fixed filter implementation in gate * Fixed key defaults in gate * Made passes=0 work in GSM * Added bandlimiting filter to GSM (less cruchy sounds) 2003-02-24 Steve Harris <steve(a)plugin.org.uk> * Removed stale code from surround encoder * Fixed memory leak in surround encoder 2003-02-24 Steve Harris <steve(a)plugin.org.uk> * Fixed maths error in multiplexer * Fixed buffer overrun in sifter * Efficiency improvements to FAD delay * Fixed infinite loop in FAD delay. * Fixed (another) buffer overrun in FM oscillator * Performance improvement for FM oscillator * Fixed buffer overrun in multiband EQ * Fixed aliasing in Hermes * Fixed memory leaks in: AM pitchshift Analogue osc Bode sifters Comb Comb splitter Delayorama Dyson compressor FM oscilator Giant flange Gong GVerb Hermes filter L/C/R delay Multiband EQ Plate reverb Rate shifter Retro flanger Satan maximiser SC* Sifter Single band parametric Multiplexer Tape delay There are still known leaks in imp and the multiband EQ

21 years, 7 months

RE: [linux-audio-dev] How to delay video?

by Sreelal Chandrasenan

hardware solution Prime Image video delay (both analog/digital) www.primeimageinc.com -----Original Message----- From: Anders Torger [mailto:torger@ludd.luth.se] Sent: Thursday, March 06, 2003 9:33 AM To: linux-audio-dev(a)music.columbia.edu Subject: [linux-audio-dev] How to delay video? Not so much related to sound perhaps, but a bit. I'm trying to find a solution to delay a video signal. The idea is to be able to synchronise video with advanced surround sound processing which runs in my convolution engine (BruteFIR) and has 100 - 400 ms I/O-delay (depending on configuration). Any suggestion of hardware or software solution or both is ok, apart from using a very very long cable, I have already thought of that one :-). Since this concerns high-end reproduction on the sound part, it would be good if the resulting video quality is good too. The source would be a DVD-player (stand alone product) of some sort. S-video output or RGB or whatever the best is... /Anders Torger

21 years, 7 months

[linux-audio-dev] How to delay video?

by Anders Torger

Not so much related to sound perhaps, but a bit. I'm trying to find a solution to delay a video signal. The idea is to be able to synchronise video with advanced surround sound processing which runs in my convolution engine (BruteFIR) and has 100 - 400 ms I/O-delay (depending on configuration). Any suggestion of hardware or software solution or both is ok, apart from using a very very long cable, I have already thought of that one :-). Since this concerns high-end reproduction on the sound part, it would be good if the resulting video quality is good too. The source would be a DVD-player (stand alone product) of some sort. S-video output or RGB or whatever the best is... /Anders Torger

21 years, 7 months

[linux-audio-dev] Octavian 0.1.0 pre-beta released

by Roman Kaljakin

I am pleased to announce Octavian - a realtime software synthesizer for GNU\Linux operating system. http://octavian.sourceforge.net http://sourceforge.net/projects/octavian/ Octavians's design is like analog modular synthesizers, so it can be used both as synth and as effect processor. Modular tasks separation allow to extend possibilities in simple way. Modules can be connected between each other via channels. Features: Audio Input/Output: - OSS - JACK MIDI Input/Output: - OSS - ALSA Plugin's compatability: - native modules - LADSPA This is first pre-beta release. It is a big subject for changes and improvements, so please send your wishes and bugreports. Roman ------------------------------------------- -------- mailto: wormpost(a)mail.ru --------- -------------------------------------------

21 years, 7 months

[linux-audio-dev] shared memory tools?

by Juhana Sadeharju

Hello. I need two functions: make_shm(int size, char *key) -run by root -creates a locked shared memory segment -returns a key (preferably a string) which is used to access the shared memory char *request_shm(char *key) -run by users -returns the address of the requested shared memory segment Could somebody please write these routines to me? Or give good hints? I have Jack and other codes, but it all is confusing when the shared memory should be accessed from separate process which is not fork() of the other. Should I use mmap() or shm_get() approach? What then is "/dev/shm"? How to use it? Best regards, Juhana

21 years, 7 months

[linux-audio-dev] ANN: New version of liblrdf

by Steve Harris

0.2.4 http://plugin.org.uk/lrdf/ liblrdf is a library for handling RDF files describing LADSPA plugins, plus it can also do lightweight general RDF tasks. Changes: Added a pkgconfig file suppllied by Taybin Fixed a buffer overrun triggered by rebuilding the caches Fixed a bunch of memory leaks PS Someone had some code that generated string to build GTK (I think) menus from, if you could mail me the code again then I'l provide it as a function or at least put it in the documentation. Sorry, I lost the mail and forgot your name :( - Steve

21 years, 7 months

[linux-audio-dev] BEAST approaching release

by Stefan Westerfeld

Hi! Tim Janik and I are currently working on sorting out the remaining issues until we can release BEAST -> http://beast.gtk.org which is at this point really useful for creating music already. If you want to hear my first approach of doing a song with BEAST, you can find it here: -> http://space.twc.de/~stefan/music/liquid_life.ogg At this point, we're increasingly looking for people which point us out to release critical bugs or lend us a hand at doing the remaining polishing. For instance, if anybody wants to contribute another song, icons, documentation, now would be a good point in time to do it. You can build BEAST from CVS, as we do not plan to release a tarball until we're fairly certain that it is stable for end-users. As a side note, both of us will attend the LAD conference, so I'm looking forward to meeting everybody who is there personally. Cu.. Stefan -- -* Stefan Westerfeld, stefan(a)space.twc.de (PGP!), Hamburg/Germany KDE Developer, project infos at http://space.twc.de/~stefan/kde *-

21 years, 7 months

[linux-audio-dev] How does one alter the main mixer volume (or any other mixer level) in ALSA from a command line (via a simple system call)?

by Ivica Bukvic

Hi all, I have this small question: Is it possible (I presume it is) to alter mixer settings in Alsa by invoking some kind of a system call using shell (i.e. how the RME hdsp can have its stuff altered)? If so, what is the range of values that describe the loudest and softest levels? Finally, are these levels standardized? Any help on this matter is greatly appreciated! Thank you! Sincerely, Ico P.S. Apologies for cross-posting.

21 years, 7 months

Re: [linux-audio-dev] question re: hammerfall cards

by Patrick Shirkey

>its completely ALSA-generic. it applies to all cards. the >documentation that exists right now is weak. the "best" there is so >far (that i've seen) is in alsa-lib/doc/asoundrc.txt. its not for the >faint-of-heart. its not even for people who cycle double centuries for >fun :) If you want to know more about the .asoundrc file then have a look at http://www.alsa-project.org/alsa-doc/doc-php/asoundrc.php3?company=Generic&… This doesn't explain aplay/arecord in full but there are some examples. -- Patrick Shirkey - Boost Hardware Ltd. Http://www.boosthardware.com Http://www.djcj.org - The Linux Audio Users guide ======================================== Being on stage with the band in front of crowds shouting, "Get off! No! We want normal music!", I think that was more like acting than anything I've ever done. Goldie, 8 Nov, 2002 The Scotsman

21 years, 7 months

[linux-audio-dev] Jack 0.61.0 release

by Taybin

Jack Audio Connection Kit 0.61.0 Release The Jack team is pleased to announce the release of version 0.61.0 of the Jack low-latency audio server. Jack allows applications to share data and audio devices in synchronous operation, and has already seen a year of hard testing and refinement. The API has stabilized for the foreseeable future, although backwards compatibility is not guaranteed. More information on Jack is available at the group's web site, http://jackit.sourceforge.net/. What's new: * In-process client support. * documentation updates. * bug fixes. Developers and users interested in Jack should sign up to jackit-devel, our mailing list.

21 years, 7 months

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Linux-audio-dev March 2003