Linux-audio-dev

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7516 discussions

[linux-audio-dev] liblo method handler lookup logic

by David Olofson

Hacked some test code here and discovered something "interesting" with lo_server_add_method() and method handling. If I try to do it like in the examples and add the default/debug ("match all") method first, it gets called for every incoming message, before the real handler is called. That is, I see an error message - and then the correct method handler is invoked anyway. Looking quickly at the code, I'd actually expect this behavior, as lo_server_add_method() does indeed add methods at the end of the list. Trying the examples again, I realize that they demonstrate this behavior as well, so maybe it's not just my code doing something funny. :-) This is with liblo 0.22 on Gentoo/AMD64. //David Olofson - Programmer, Composer, Open Source Advocate .------- http://olofson.net - Games, SDL examples -------. | http://zeespace.net - 2.5D rendering engine | | http://audiality.org - Music/audio engine | | http://eel.olofson.net - Real time scripting | '-- http://www.reologica.se - Rheology instrumentation --'

19 years, 9 months

[linux-audio-dev] libsamplerate question

by David

Hello everybody ! I've just added a resampling function to my code thanks to the excellent work of Erik de Castro Lopo (thanks a lot !). Combined with libsndfile (thanks again) it is really easy to load any sound file I want. But I'd like to make sure I'm using it correctly. I process my input data in one pass using src_simple() and I have to compute the length of the output data buffer beforehand. So I did somehting like this : out_len = (long int) ceil((double) in_len * ratio); It seems that my output buffer is always one frame too big (I checked this by reading the output_frames_gen field of the SRC_DATA structure after the processing is done). Is it safe to assume that using floor() instead of ceil() will not lead to a too short output buffer in some cases ? I can live with wasting a malloced float but I'd like to be sure it cannot be done in a prettier way. Thanks. -- David

19 years, 9 months

[linux-audio-dev] [ANN] WhySynth DSSI plugin 20060122 release

by Sean Bolton

Announcing the 20060122 release of WhySynth, a DSSI softsynth plugin. New since the last major release: * A new oscillator mode, based on Nasca O. Paul's gorgeous PADsynth algorithm. * A new filter mode, essentially the low-pass filter from amSynth. * A new dual delay effect. * Improved and extended wavetables. * More patches. * Lots of cleanups and bug fixes, including fixes for more stable operation especially under Rosegarden, and for compilation on Mac OS X 10.4 'Tiger'. Find WhySynth here: http://home.jps.net/~musound/whysynth.html More information on the DSSI plugin standard, available hosts and plugins can be found here: http://dssi.sourceforge.net/ WhySynth is written and copyright (c) 2006 by Sean Bolton, under the GNU General Public License, version 2.

19 years, 9 months

[linux-audio-dev] Additional chunks in WAV files with libsndfile ?

by fons adriaensen

Hi all, is there a recommended way to write / read additional chunks in WAV files, using libsndfile (assuming it's possible at all - I didn't find any hints to this in the docs) ? What I need in particular is some way to calibrate the time axis - i.e. to say frame #N corresponds to t = 0, and some other similar info, mostly sample indices. TIA, -- FA

19 years, 9 months

[linux-audio-dev] MIDI library

by Dominique Michel

Hi all, I am new to this list, living in Switzerland and working mainly with electronic. I have done it was some time ago a monophonic realtime note recognition software on an embeded dsp56k system and I want to adapt it to linux. It will take some time to me to do that because I know almost nothing about c and c++ programming, as about the alsa and jack libraries. But I know my algorytm, and it is working just fine on my dsp. The latency is very low, 1+(~1/4) period of the sound, the (~1/4) term depend of the harmonic content of the sound. I believe at it is worth to do a jack-alsa software with it. A gui will be needed, giving the possibility to change, save and recall some parameters of the recognition loop on an per instrument basis. Can you recommand me a good, and if possible simple to use and fast, MIDI library? I will use only basic functionalities as the possibility to send MIDI notes to the sound server. Ciao, Dominique

19 years, 9 months

[linux-audio-dev] Using UTF-8

by Richard Smith

A while ago the list moderator requested that all of us gmail users "fix" our mail by setting the UTF-8 option. Which I did. However, I'm now on another mailing list on Sourceforge where the utf-8 thing causes junk to be added after my signature. This is some sort of bug in sorceforge's base64 handleing. I've been asked by why I had it set that way. So I was just wondering what the issue with non- utf8 mail was on lad. -- Richard A. Smith

19 years, 9 months

[linux-audio-dev] [ANN] ninjam with jack support...

by torbenh＠gmx.de

hello... i just wanted to announce, that i have written a jack binding for ninjam. ninjam is a network jam session software. www.ninjam.com the ported consoleclient for ninjam is available here: http://galan.sf.net/ninjam-with-jack.tar.bz2 and yes... there is a Makefile.. find -name Makefile it... i just added the jack support... more io ports will follow... also dont use with too low period sizes, it does not behave so well.. -- torben Hohn http://galan.sourceforge.net -- The graphical Audio language

19 years, 9 months

[linux-audio-dev] templates - little bit OT

by conrad berhörster

Hello, maybe the c++ gurus out there have an idea. currently i think it is unpossible. i try to use a template a a class member variable, like that: asume a template matrix class template < int cols, int rows> class matrix { // implementation } everything works fine when i'm doing something like matrix<<3,4> mymat; matrix <5,5> quad; but now i try to do it a little more generic i try to build a class, which have a member of this matrix like class MyClass { MyClass(); MyClass(n,n); private: matrix<n,n> }; this means, at runtime, i want to set the size of the matrix. is this possible? this are divers concepts (templates and runtime) , aren't they? thanks c~

19 years, 9 months

[linux-audio-dev] hexter DSSI plugin 0.5.9

by Sean Bolton

A minor update of hexter, the Yamaha DX7 modeling DSSI plugin, is now available at: http://sourceforge.net/project/showfiles.php? group_id=104230&package_id=134428 Changes include: * The coarse frequency of each operator now can be controlled in real time via MIDI control changes. * Fixes for RPM, gcc 2.9x and 4.x, and Mac OS X 10.4 'Tiger'. More information about hexter and DSSI can be found at: http://dssi.sourceforge.net/hexter.html hexter is written by Sean Bolton, and copyright (c)2006 under the GNU General Public License, version 2 or later.

19 years, 9 months

[linux-audio-dev] synthesis on gp2x .. (was Fwd: RE: [gpx-dev] hardware interfaces)

by Jay Vaughan

just to let you guys know .. following up on the GP2X synthesis thread from earlier, the author of littleGPtracker for the GP32 (ARM-based handheld predecessor to the GP2X) has this to say about synthesis on ARM .. j. >Delivered-To: 29-jayv(a)synth.net >From: "M-.-n" <nostromo(a)arkaos.net> >To: <gpx-dev(a)ampfea.org> >Subject: RE: [gpx-dev] hardware interfaces >Date: Thu, 12 Jan 2006 09:20:05 +0100 >X-Priority: 3 (Normal) >Importance: Normal >X-BeenThere: gpx-dev(a)ampfea.org >X-Mailman-Version: 2.1.5 >Reply-To: gpx-dev(a)ampfea.org >List-Id: gpx-dev.ampfea.org >List-Unsubscribe: <http://www.ampfea.org/mailman/listinfo/gpx-dev>, > <mailto:gpx-dev-request@ampfea.org?subject=unsubscribe> >List-Archive: <http://www.ampfea.org/pipermail/gpx-dev> >List-Post: <mailto:gpx-dev@ampfea.org> >List-Help: <mailto:gpx-dev-request@ampfea.org?subject=help> >List-Subscribe: <http://www.ampfea.org/mailman/listinfo/gpx-dev>, > <mailto:gpx-dev-request@ampfea.org?subject=subscribe> >Sender: gpx-dev-bounces(a)ampfea.org > > > >On littleGPtracker (still GP32; running @133Mhz), I do 8 monophonic stereo >voices (sampled based) using about 50% of the CPU. This includes possibility >of arpegiation, pitch shifting, legato & volume envelope control but no >filters yet. Sure the sample engine is pretty crude at the moment but u will >have PLENTY enough power in the 2x to do nifty things. > >-----Original Message----- > >MHz does not say much, I think, but it should be plenty to do a lot of >fun with :) > >-- > >Joost Schuttelaar > >_______________________________________________ >gpx-dev mailing list >gpx-dev(a)ampfea.org >http://www.ampfea.org/mailman/listinfo/gpx-dev > > > > >_______________________________________________ >gpx-dev mailing list >gpx-dev(a)ampfea.org >http://www.ampfea.org/mailman/listinfo/gpx-dev -- ; Jay Vaughan

19 years, 9 months

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Linux-audio-dev