Linux-audio-dev November 2003

linux-audio-dev@lists.linuxaudio.org

84 participants
92 discussions

by james＠dis-dot-dat.net

Hi, I've recently been learning to use JACK, and I had a look around for some kind of introductory article. I couldn't find one, so I wrote the tutorial I would have wanted, as I learnt. The tutorial is here: http://dis-dot-dat.net/jacktuts/starting/index.html Please have a look, make suggestions. Flames are fine, too. Let me know if I've made some huge error. Or maybe I'm not doing things the best way? Whatever, let me know. If this is well received, I'll write about more advanced topics as I get to them - mixing, the transport, threading without blocking the process callback, etc. I'll probably be asking a lot of questions later on, especially about best practise. Thanks peeps, James

21 years, 1 month

[linux-audio-dev] linux audio and ppc

by Antonio Willy Malara

hi!! this is my fist post on LAD, something may know me from my presence on #lad @ freenode :P btw i've a question for you all.. is someone using a powermac for linuxaudio apps? if yes what audio interface do you use? i've got an imic but i've a loooooot of troubles!! -- wil - BeHappy_

21 years, 1 month

[linux-audio-dev] AGNULA joins the Prato LUG for Linux Day 2003

by The AGNULA team

+-----------------------------------------------------------------+ | ______ ______ _ _ _ | | /\ / _____) ___ \| | | | | /\ | | / \ | / ___| | | | | | | | / \ | | / /\ \| | (___) | | | | | | | / /\ \ | | | |__| | \____/| | | | |___| | |_____| |__| | | | |______|\_____/|_| |_|\______|_______)______| | | | +-----------------------------------------------------------------+ [Sorry for cross-posting. Feel free to forward around] Florence, 12 Nov 2003 +++ AGNULA joins the Prato LUG for Linux Day 2003 [0] The AGNULA project is proud to join the Prato Linux User Group [1] for the 2003 edition of the Linux Day, to be held on November 29. The AGNULA team will hold a presentation/workshop on the current state of the project, the directions we are taking and the whos and whats on audio/video development with Libre Software. +++ For the third consecutive year ILS (the Italian Linux Society) [2] is promoting the Linux Day: all Linux/Free Software User Groups which support the initiative [3] will organize meetings, workshops and installation parties in their own zone of reference. PLUG (Prato Linux User Group) has kindly asked the AGNULA project to join their meeting, which will be held in PLUG's headquarters (via Pomeria 90, Prato, Italy). [4] AGNULA's participation to the Linux Day will focus on: - the current state-of-the art of the AGNULA project; - the current state-of-the art of the AGNULA/DeMuDi distribution; - the directions the AGNULA project will take in the next months; During the meeting, CD-ROMs of AGNULA/DeMuDi 1.0 will be distributed. +++ About AGNULA: AGNULA (acronym for A GNU/Linux Audio Distribution, pronounced with a strong g) is the name of a project funded by the European Commission (number of contract: IST-2001-34879; key action IV.3.3, Free Software: towards the critical mass). The project aims to spread Free Software in the professional audio/video arena. About PLUG: PLUG (acronym for Prato Linux Users Group) is a no-profit association devoted to promoting Libre Software and Open Hardware, spreading the conscious use of IT instruments, thus allowing access to low-cost and old hardware to help economically disadvantaged people. -- The AGNULA Team info(a)agnula.org Our mailing lists: http://lists.agnula.org/ Our web site: http://www.agnula.org/ "There's no free expression without control on the tools you use" [0] http://www.linux.it/LinuxDay/main.shtml [1] http://www.prato.linux.it/ [2] http://www.linux.it/ [3] http://www.linux.it/LinuxDay/programma.phtml [4] http://mappe.virgilio.it/tc/mappa.jsp?com1=prato+%28po%29&to1=via+pomeria&c…

21 years, 1 month

[linux-audio-dev] Demolition results, attention LADSPA developers

by Nick Lamb

Here are my latest test results from running Demolition http://www.ecs.soton.ac.uk/~njl98r/code/ladspa/demolition.html 237 plugins were tested from 117 plug-in libraries, including all the ones in BLOP, CMT, SWH, MCP and REV. I'm disappointed to see that demolition has not been used to improve the quality of LADSPA plugins. This post is a metaphorical stick, since the carrot has not worked. If you see a plugin you like here, make sure the maintainer fixes it. So without further ado here are the error reports. Matthias Nagorni vcf_cv_in.so / vcf.so UniqueIDs 1729, 1728, 1723, 1721 ERROR: set_run_adding_gain() implemented without run_adding() Matthias also re-uses UniqueIDs for CV and non-CV variants of the same plugin - with correspondingly different numbers of ports - which is probably going to cause some strange crashes in some LADSPA hosts. Mike Rawes <mike_rawes[at]yahoo.co.uk> triangle_1649.so square_1643.so sawtooth_1641.so random_1661.so fmod_1656.so lp4pole_1671.so pulse_1645.so (all plugins in each library) ERROR: port 0 is LOGARITHMIC but LowerBound isn't positive Fons Adriaensen <fons.adriaensen(a)alcatel.be> mvclpf24.so cs_phaser.so (all plugins in each library) ERROR: Label contains illegal white-space character Steve Harris <steve(a)plugin.org.uk> retro_flange_1208.so multivoice_chorus_1201.so ERROR: Floating point exception [Arguably acceptable for bogus input...] Alexander Ehlert <mag(a)glame.de> notch_iir_1894.so lowpass_iir_1891.so highpass_iir_1890.so bandpass_iir_1892.so bandpass_a_iir_1893.so ERROR: Segfault [Accesses invalid memory pointer when cleanup is called] Andy Wingo <wingo at pobox dot com> delay_1898.so comb_1887.so allpass_1895.so (all plugins in each library) ERROR: Segfault Jesse Chappell SooperLooper.so ERROR: port 1 is LOGARITHMIC but LowerBound isn't positive ERROR: port 2 is LOGARITHMIC but LowerBound isn't positive Richard W.E. Furse cmt.so 83 errors reported in total, some examples listed.. # UniqueID = 1069 ERROR: port 0 is LOGARITHMIC but LowerBound isn't positive # UniqueID = 1092 ERROR: unwritten output port 8 ERROR: unwritten output port 9 ERROR: unwritten output port 10 ERROR: unwritten output port 11 # UniqueID = 1080 ERROR: port 2 has DEFAULT_MAXIMUM without BOUNDED_ABOVE # UniqueID = 1225 ERROR: Segfault

21 years, 1 month

[linux-audio-dev] [PATCH] oss driver for jack 0.90.0

by Jussi Laako

Attached is a patch to add OSS audio driver support to the jack-audio-connection-kit 0.90.0. This is a first quick hack of 0.80.0 driver to 0.90.0, but better one is coming.. Apply patch and run "autoreconf --force --install" to regenerate configure stuff. RPMs for RedHat 9 and source .tar.gz is available at http://www.sonarnerd.net/linux/ and SuSE 9 packages are coming. -- Jussi Laako <jussi.laako(a)pp.inet.fi>

21 years, 1 month

[linux-audio-dev] JACK-0.90.0 Released

by Taybin Rutkin

********JACK 0.90.0******** JACK is a low-latency audio server, written primarily for the GNU/Linux operating system. It can connect a number of different applications to an audio device, as well as allowing them to share audio between themselves. Its clients can run in their own processes (ie. as normal applications), or can they can run within the JACK server (ie. as a "plugin"). JACK is different from other audio server efforts in that it has been designed from the ground up to be suitable for professional audio work. This means that it focuses on two key areas: synchronous execution of all clients, and low latency operation. Source packages for Jack 0.90.0 are available http://sourceforge.net/projects/jackit/ . ********Major Changes******** Buffers can resize during operation. This can be triggered by the user or by the function jack_set_buffer_size(). See the documentation for details. It is new code and still needs a shakedown. It can be enabled with './configure --enable-resize'. If not compiled in, jack_set_buffer_size() returns ENOSYS. Applications should be prepared for it though. Major rewrite of the thread model. This won't affect users. Thanks to the rewrite, jack now has a "freewheeling" mode for faster than realtime operation. It decouples the engine from the soundcard. The alsa driver has 3 new options. --i, --inchannels sets the number of channels to open for input. --o, --outchannels sets the number of channels to open for output. -S, --shorts changes the order of in which the sampleformats are tried. The driver will try to use 16bit samples first and only tries 32bit if this fails. Useful if you digitaloutput card supports 32bit samples but your interface doesn't. ********Minor Changes******** Greatly increased support for other architectures. --version also prints out the temporary directory. Example clients expanded to be more helpful. Many bug fixes. Updated and improved documentation. Portaudio driver works on linux. jack_connect() returns EEXIST if a connection is already made. Addition of jack_get_current_transport_frame (). hw:0 is the default ALSA device instead of "default". Jack's build system has better optimization. --silent option for halting jackd's output. Removal of --tmpdir and --asio options. Will compile with alsa-lib-1.0.0pre1 (the latest). ********Other******** Jack now has a mantis bugtracker at http://jackit.sf.net/mantis/ . Please use that for bug reports. James has written a tutorial for jack programmers available at http://dis-dot-dat.net/jacktuts/starting/index.html . ********Deprecated******** These are deprecated structures and functions that have been deprecated. They will likely be removed in a future release. The jack_transport_info_t struct has been deprecated. Please use jack_position_t instead. jack_engine_takeover_timebase() has been deprecated. Please use jack_set_timebase_callback() instead. jack_set_server_dir() has been deprecated. jack_get_transport_info() has been deprecated. Please use jack_transport_query() instead. jack_set_transport_info() has been deprecated. Instead, define a JackTimebaseCallback.

21 years, 1 month

[linux-audio-dev] M-audio Firewire 410

by Girish Wadhwani

Hi, Does anybody the state of Linux support for the firewire 410? Searching through various mailing lists, I found comments that suggested that somebody was working on it but I couldn't find any further information. Does anybody know if this is a MLan device? Any information sources that point towards a datasheet or similar would be very useful. Thanks, Girish __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree

21 years, 1 month

[linux-audio-dev] M-audio Firewire 410

by Girish Wadhwani

21 years, 1 month

[linux-audio-dev] Slashdot: linux-based music keyboard workstation released

by Paul Winkler

http://slashdot.org/articles/03/11/10/197202.shtml?tid=110&tid=121&tid=141&… Looks like the site is thoroughly slashdotted... I haven't actually been able to read anything there yet. There's some of the usual ignorance posted in the comments. Moderators, mod the good stuff up :-) -- Paul Winkler http://www.slinkp.com Look! Up in the sky! It's THE MACHINE! (random hero from isometric.spaceninja.com)

21 years, 1 month

[linux-audio-dev] Just for fun - Hearnet

by Hans Fugal

This is a little toy I hacked up while learning the Jack API today. It is not sophisticated, it is hackish, and it is probably not really doing precisely what I intended it to do. But it's fun. It does a simple form of granular synthesis: it plays a grain for every incoming packet in realtime. Requires libpcap and libjack (of course). http://falcon.fugal.net/~fugalh/hearnet/ Feedback is welcome. -- Hans Fugal | De gustibus non disputandum est. http://hans.fugal.net/ | Debian, vim, mutt, ruby, text, gpg http://gdmxml.fugal.net/ | WindowMaker, gaim, UTF-8, RISC, JS Bach --------------------------------------------------------------------- GnuPG Fingerprint: 6940 87C5 6610 567F 1E95 CB5E FC98 E8CD E0AA D460

21 years, 1 month

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Linux-audio-dev November 2003