Linux-audio-dev March 2007

linux-audio-dev@lists.linuxaudio.org

79 participants
63 discussions

[linux-audio-dev] promoting LAC 2007

by Malte Steiner

Hello, so far I cant find reports on LAC 2007 on Blogs or newspages, neither on Linux related nor electronic music ones. Tonight I want blog myself some (subjective) impression and would like to gather some nice photos, I have only done some crappy images with my mobile. Then I would start to bother other blogs to write about it, normally the interest is there. Cheers, Malte -- Malte Steiner media art + development -www.block4.com-

17 years, 8 months

[linux-audio-dev] Re: MIDI over WiFi

by lazzaro

On Mar 31, 2007, at 5:26 AM, Jens M Andreasen wrote: > What I wonder is; wouldn't it be possible to bypass this USB radio > transmitter/recaiver dongle-thingie and fast forward to the wireless > capabilities already built in to most of modern portable devices sold > today? Hey, even the OLPC aimed at third world children have this > capability ... If you access to two OS X machines for a few minutes, run the Network MIDI Driver over Airport (Network MIDI Driver described here: http://www.soundonsound.com/sos/jul05/articles/tiger.htm#3 You'll see it works OK, even with the 1-2% packet loss that the IP layer sees on a typical WiFi network. Apple's implementation uses IETF RFC 4695 (a.k.a. RTP MIDI) as the transport layer, which includes a resiliency system (the recovery journal) for handling an arbitrary number of lost packets with only transient artifacts. More on RTP MIDI here: http://www.cs.berkeley.edu/~lazzaro/rtpmidi/index.html Note that there are actually third-party products now compatible with Apple's protocol, although these products are for wired networks. And, last time I checked didn't implement the recovery journal part of the RTP MIDI (and so can't be trusted over switches that lose packets -- although my info on the product might be out of date): http://www.kiss-box.com/products.pdf > It kind of puzzles me that this is not happening already ... I haven't looked into the issue in detail, but for my own use wireless only makes sense if I don't have to be constantly worrying about the battery life of the device. At the moment, what I see in the state of the art in portable WiFi chips -- the chip in the Sony PSP and the chip in the Microsoft Zune -- is not too encouraging in this regard. But hopefully in a few generations of chip designs this will get better. This review: http://emusician.com/midi/emusic_maudio_midair/ make the point well of how limiting the battery life can be for a MIDI wireless controller right now. --- John Lazzaro http://www.cs.berkeley.edu/~lazzaro lazzaro [at] cs [dot] berkeley [dot] edu ---

17 years, 9 months

[linux-audio-dev] [ANN] QjackCtl 0.2.22 released!

by Rui Nuno Capela

Long overdue but better late than never: QjackCtl, the good old Qt GUI interface to JACK Audio Connection Kit is back on a new latest dot releasse. As read from the changelog: - Fixed default settings for the freebob backend (JACK >= 0.103.0). - CPU Load status label now says correctly DSP Load. - The most recently used patchbay definitions can now be correctly selected in round-robin fashion from its drop-down list widget. - Avoid mixing JACK MIDI ports with regular audio ports on the Connections and Patchbay widgets; strictly list only audio ports. - Added 192k sample rate to setup settings drop down list (as kindly reminded by Klaus Zimmermann, thanks). - Most top-level widgets were missing the normal-widget flag, which were causing some sticky size behavior on some window managers. Enjoy. -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

17 years, 9 months

[linux-audio-dev] [ANN] New releases

by Fons Adriaensen

New releases and updates at <http://www.kokkinizita.net/linuxaudio> Aliki-0.0.3 Impulse response measurement. - Many bug fixes, should be a bit more stable now... - Added flexible export options. - Manual updated. Jace-0.0.4 Low-weight convolution engine for JACK and ALSA. - Now includes configuration and IR files for stereo dipole processing using the filters designed by E. Choueiri of Princeton University. These are the best filters available AFAIK. AmbDec-0.0.1 1st and 2nd order Ambisonic decoder. - First release. Universal decoder with many advanced features. PDF manual also available. Enjoy ! -- FA Follie! Follie! Delirio vano è questo !

17 years, 9 months

[linux-audio-dev] High-level sound API for python?

by Dennis Schulmeister

Hi, My question is if there's any high-level sound API for python. I don't want to process audio. Instead I'm looking for an API (or a combination thereof) which could be used to implement a small media player feeding several backends (ALSA, OSS, ...) After a little search I found pyMedia (www.pymedia.org) which looks like a real winner. But if I'm not wrong it supports OSS only. Thanks for your input. Yours sincerely, Dennis Schulmeister -- Dennis Schulmeister - Schliffkopfweg 12 - 76189 Karlsruhe - Germany Tel: 0721/5978883 - Fax: 0721/5705992 - dennis(a)windows3.de http://www.windows3.de - http://www.denchris.de http://www.audiominds.com - http://www.motagator.net/bands/65

17 years, 9 months

[linux-audio-dev] MIDI over WiFi

by Jens M Andreasen

Hi! I have noticed that it getting increasingly popular to produce wireless midi-controllers. M-Audio have a couple and CME appears to go along with them with some of their products. From the PR-blurbs I reckon that they both use the same patented technology. What I wonder is; wouldn't it be possible to bypass this USB radio transmitter/recaiver dongle-thingie and fast forward to the wireless capabilities already built in to most of modern portable devices sold today? Hey, even the OLPC aimed at third world children have this capability ... Are there any pitfalls like, say unreliable timing using standard protcols over wireless? Why would we like to use transmitter -> receiver -> USB -> computer, if we could just go for transmitter -> receiver using the chips already present on the motherboard? There is of course one slight problem, as of yet, no midi-keyboard has a general purpose builtin wireless radio. With any luck, it could be so fortunate that some lurker on this list recognizes a busines-opportunity .. or perhaps one of you guys could mention the idea next time you share a private moment with one of the pointy-haired bosses? It kind of puzzles me that this is not happening already ... --

17 years, 9 months

[linux-audio-dev] [ANN] JackMix 0.3 hits the shelfs

by Arnold Krille

JackMix, the ultimate mixer app for jack hits another milestone: "Sliders vs. Knobs" From the "programming during Linux-Audio-Conference"-depth. comes the next release of JackMix. Whats new since 0.2? Inspired by a lot of talking during LAC I have redone the sliders. They still look kind of similar to some vu-meters but I think it isn't that bad anymore. But there are new knobs in this version too. They did get positive feedback during the conference. :-) The knobs from 0.2 didn't seem to scale well. At least not from the usability point. The biggest change is that version 0.3 saves the own state to xml-files which can be read again later. Also adding a filename on the commandline opens that file on startup. This enables version 0.4 to have lash-support. And there is a new interface so backend can interact with the gui in a better way. The main effect now is that if jackd is not running its not the jackmix mainwindow that is complaining but the backend popping up a message. Visit http://www.arnoldarts.de/drupal/?q=node/568 to find more. See http://www.arnoldarts.de/drupal/?q=JackMix%3Ascreenshots for screenshots or just download the package from http://www.arnoldarts.de/drupal/files/downloads/jackmix/jackmix-0.3.tar.gz Have a nice weekend, Arnold -- visit http://www.arnoldarts.de/ --- Wenn man mit Raubkopien Bands wie Brosis oder Britney Spears wirklich verhindern könnte, würde ich mir noch heute einen Stapel Brenner und einen Sack Rohlinge kaufen.

17 years, 9 months

[linux-audio-dev] LAC streams online?

by Pau Arumi

Hi folks, here * I found lots of ogg files tagged as 21,22 and 23 March. But no file from Saturday 24th. Are they anywhere online? * http://lad.linuxaudio.org/events/2007_tub/ Thanks, Pau

17 years, 9 months

[linux-audio-dev] [ANN] List migration on the 1st of april

by Marc-Olivier Barre

Dear members, I am proud to announce that we will proceed with the list migration during the night between the 31st March and the 1st April (at 0h00 GMT). >From this point on, emails should be sent to these addresses : - linux-audio-dev(a)lists.linuxaudio.org for the developper mailing list - linux-audio-user(a)lists.linuxaudio.org for the user mailing list - linux-audio-announce(a)lists.linuxaudio.org for the announce mailing list The following aliases have been defined, to make it look nicer. Consider them as shorter equivalents : - lad(a)lists.linuxaudio.org for the developer mailing list - lau(a)lists.linuxaudio.org for the user mailing list No alias for the announce list since it is an open list (non subscribers are allowed to post) and we fear a increase in spam with a too short name. Also, to respond to a request to a few of you working with command line mail clients, the list tag at the beginning of the subject line will be shortened : [LAD] for linux-audio-dev [LAU] for linux-audio-user [LAA] for linux-audio-announce You may need to update your email filters accordingly. Those of you posting on the old addresses will get a message providing you with the new email to use. __________________ Marc-Olivier Barre, Markinoko.

17 years, 9 months

[linux-audio-dev] LAC2007 ---> LAC2008

by Simon Schampijer

Hi all, *the 5th International Linux Audio Conference *is *over.* The lac organization team 2007 had a busy but good time and we hope you enjoyed your stay in Berlin too. *As always many thanks to all participants, speakers, artists, partners and helpers! *This great event would not have been possible without your help. During the conference Martin Rumori and Frank Barknecht of the Academy of Media Arts offered to host the LAC2008 in Cologne. So see you all in cologne next year and the best wishes from Berlin. We started to put up some pictures from the lac here: http://www.kgw.tu-berlin.de/~lac2007/picslac/index.html If you have made some nice pictures they can be added here as well. Please send them to: lac2007(a)kgw.tu-berlin.de We have added a page on the LAC wiki where you can post your ideas and comments regarding the Linux Audio Conference. This could be helpful to the organizers of the upcoming ones and interesting to the ones who organized the lac2007. Best, Simon

17 years, 9 months

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Linux-audio-dev March 2007