Linux-audio-dev

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7516 discussions

[linux-audio-dev] help on echo cancellation

by BINI A A

hi there we are trying to use linphone for a project,i dont know whether it supports echo cancellation or not,i think it is not there in linphone. can we integrate the echocancellation module given at http://home.arcor.de/andreadrian/echo_cancel/draft-aec-03.txt to the linphone..or can we seperate out the echo cancellation module in Speex and use it with linphone? which will be better and easier? thanks bini --------------------------------------------------------------------------- "This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. Any unauthorized review, use, disclosure, dissemination, forwarding, printing or copying of this email or any action taken upon this e-mail is strictly prohibited and may be unlawful." ---------------------------------------------------------------------------

20 years, 2 months

[linux-audio-dev] [ANN] First official release of JAPA - Perceptual Analyser

by fons adriaensen

Hello all, The first official release (0.1.1) of JAPA is now available at <http://users.skynet.be/solaris/linuxaudio> Changes w.r.t. the 0.0.1-alpha release: - now uses anti-aliased fonts (via Xft/fontconfig) - added /etc/japa.conf - added 80dB range - added 440Hz log scale - some bugfixes Many thanks to the alpha testers, in particular Lukas Erni. JAPA is a 'perceptual' or 'psychoacoustic' audio spectrum analyser. This means that the filters that are used to analyse the spectrum have bandwidths that are neither constant (as in JAAA), nor proportional to the center frequency (as in a 1/3 octave band analyser), but tuned to human perception. With the default settings, JAPA uses a filter set that closely follows the Bark scale. -- FA

20 years, 2 months

[linux-audio-dev] reminder: LAD AI Composer Competition

by Leonard "paniq" Ritter

agh, sorry, wrong reply-to ;) http://www.paniq.org/index.php/AI_Composer_Competition -- -- leonard "paniq" ritter -- http://www.paniq.org -- http://www.mjoo.org

20 years, 2 months

[linux-audio-dev] High res timers

by Lee Revell

Hey, In case you didn't know, the high res timers patch (which Ingo calls "a critical piece of RT infrastructure") has been merged into Ingo's RT preempt patch. So I think it's safe to assume it will be going in the mainline kernel too. This is great news for Linux audio as sub HZ timers enable lots of cool features. We will be able to send a MIDI clock that is as solid as you get from dedicated hardware. Lee

20 years, 2 months

[linux-audio-dev] www.linuxdj.com - down!

by Florian Schmidt

s. subject. down for me for quite a while already. Flo -- Palimm Palimm! http://tapas.affenbande.org

20 years, 2 months

[linux-audio-dev] threading in DSSI plugins

by Florian Schmidt

Hi, i played around with extra buffering the input/output of libconvolve (new tarball [1] and updated jack_convolve [1] (understands the --partitionsize=frames argument now which makes it use the specified size for the partition size instead of the jack buffersize), and like expected this doesn't do CPU usage any good. Easy to see in this example: jack_buffersize = 1024 partitionsize = 2048 Now the convolution code is executed only every second jack process() cycle. If the previous DSP usage was like 20% in every process cycle then it's ca. 25% in every other cycle now (estimate). The solution to even out the load is to use an extra thread [2]. For best performance i would assume that the DSSI needs an extra thread with RT scheduling (if available) and an RT prio which should be lower than all the other jack and midi threads of i.e. the DSSI host and other jack clients. So i got basically two questions: a] is it possible to use threading in a DSSI? b] would a RT prio of 1 (for the convolution thread) be an OK compromise? It will be lower than all audio stuff on a typical jack system? What is jackd's default RT prio again? Regards, Flo [3] [1] - http://tapas.affenbande.org/?page_id=5 [2] - yes, i'm aware that this needs again some extra buffering ;) But this whole larger-partitionsize-than-jack-buffersize-thing is all about trading latency for cpu niceness. If the convolution is used as non RT effect [like i.e. in a DAW for prerecorded material], then latency doesn't matter as long as the host compensates for it. [3] - i'll probably be offline from the 12th on, as i can't pay my phone bill, so be quick with answers ;) -- Palimm Palimm! http://tapas.affenbande.org

20 years, 2 months

[linux-audio-dev] [ANN] liboscqs 0.0.3 - An OSC Query System

by Martin Habets

liboscqs is a library to provide a Query System and Service Discovery for applications using the Open Sound Control (OSC) protocol [1]. The initial proposal for the OSC Query System was provided by Andrew W. Schmeder and Matthew Wright in July 2004 [2]. The next paragraph has their abstract: A Query System is proposed for inter-application control scenarios. The queries enable namespace exploration, documentation, type-signature, return-type-signature and parameter constraint specification, current-value polling, identification of common interpretation maps via osc-schema, and error reporting. See [2] for the full paper describing their proposal. This project is the result [3] of the various discussions that followed, but remains very close to the original proposal. Besides a Query System, this library provides Service Discovery. This allows applications to annouce their presence locally and on a whole computer network. For more information, source tarballs, RPM packages, and Debian packages please see the homepage at: http://liboscqs.sourceforge.net/ - Martin Factfile: - liboscqs uses liblo [4] as an OSC server. Thanks Steve! - The liboscqs source uses the scons [5] build tool - liboscqs supports Service Discovery using either Howl or Spread - liboscqs has only tested on Linux so far, but the intent is to support all POSIX systems. - liboscqs is FSH 2.3 compliant. References: [1] http://www.cnmat.berkeley.edu/OpenSoundControl/ [2] http://www.opensoundcontrol.org/papers/query_system/ [3] http://liboscqs.sourceforge.net/schema/OSCQS-schema-0.0.1.pdf [4] http://plugin.org.uk/liblo/ [5] http://www.scons.org/

20 years, 2 months

[linux-audio-dev] WAVE-EX File Format Spec

by Fred Gleason

Howdy Folks: Would anyone happen to have a link to and/or copy of the WAVE-EX file format spec handy? I've tried Googling, but closest I come is a (now broken) link to one of the M$ sites. Searching M$ directly didn't work either. Thanks! |-------------------------------------------------------------------------| | Frederick F. Gleason, Jr. | Director of Broadcast Software Development | | | Salem Radio Labs | |-------------------------------------------------------------------------| | Easiest Color to Solve on a Rubik's Cube: | | Black. Simply remove all the little colored stickers on the | | cube, and each of side of the cube will now be the original color of | | the plastic underneath -- black. According to the instructions, this | | means the puzzle is solved. | | -- Steve Rubenstein | |-------------------------------------------------------------------------|

20 years, 2 months

[linux-audio-dev] Libs for reading/writing midis

by Will Woodruff

It seems like every single linux midi app has it's own code for reading/writing midi files. What's up with that? Are there no quality libraries?

20 years, 2 months

[linux-audio-dev] [OT} : Anyone read Finnish?

by Erik de Castro Lopo

Hi all, I've got someone violating the license on Secret Rabbit Code. The offending binary-only download is listed here: http://pelit.koillismaa.fi/plugins/dsp.php but I'm having trouble getting a contact email address for pelit.koillismaa.fi and/or koillismaa.fi. I've attempted a whois which directs me to: https://domain.ficora.fi/ but I still can't find an email address. Any help that someone may be able to offer would be appreciated. Cheers, Erik -- +-----------------------------------------------------------+ Erik de Castro Lopo nospam(a)mega-nerd.com (Yes it's valid) +-----------------------------------------------------------+ The main confusion about C++ is that its practitioners think it is simultaneously a high and low level language when in reality it is good at neither.

20 years, 2 months

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Linux-audio-dev