Linux-audio-dev February 2005

linux-audio-dev@lists.linuxaudio.org

78 participants
65 discussions

by jipi

Hi folks, currently, all signal processing algos are being done in software for Linux Audio. are there any hardware accelerated support for audio hardware when doing these sort of algos? what I mean is, graphics card manufacturers have hardware acceleration where the X servers can support those acceleration. do we have it in audio? for now, RME cards do not have DSPs in them yet. (as far as i know) they only have audio signal routings and high quality audio paths. what if we want to experiment with h/w dsp? (e.g. the 1820m from creative professional aka emu) jipi

20 years, 1 month

[linux-audio-dev] Re: [linux-audio-user] emu10k1 multichannel support

by Lee Revell

On Sun, 2005-01-30 at 20:21 -0500, Lee Revell wrote: > I posted a newer version. This connects the > external inputs to the multichannel capture device. The JACK capture > ports should correspond exactly to the default kX ASIO capture channels > (1,2 is Line/Mic, 9,10 is Line2/Mic2, etc), You can record from all > inputs at once, so with a LiveDrive you can record 4 or 6 analog inputs. > > http://www.alsa-project.org/~rlrevell/emu10k1-multichannel-v008.patch > I have posted the latest version: http://www.alsa-project.org/~rlrevell/emu10k1-multichannel-v009.patch - The multiple input capture feature described above was merged into ALSA CVS, so this is no longer included in the patch. If you only need the multichannel capture feature and not the playback, you can just use ALSA CVS. I can't be certain of the mappings from inputs to JACK ports on every possible card model, though it should be similar to the kX driver. If in doubt, you can use meterbridge to monitor all 16 capture channels. - Split the snd_emu10k1_trigger_voice function into prepare_voice and trigger_voice. This should improve the sync between multiple playback channels. This behavior was derived from the opensource.creative.com driver. These improvements to the emu10k1 driver were made possible by a donation from Mark Constable. If you find these patches useful, I accept donations via my PayPal account. Lee

20 years, 1 month

[linux-audio-dev] LAC 2005: Conference programme online, register now!

by Frank Neumann

Hi all, the conference programme of the International Linux Audio Conference 2005 (LAC2005) in Karlsruhe, Germany, on April 21st-24th, 2005, is now online at http://lac.zkm.de. Small changes are still possible, though. Also, registration (free) for the conference is now possible, too, at http://lac.zkm.de/registration.shtml Quote from that page: "Admission to this year's conference requires a registration. This helps us to estimate how many visitors we may expect, what individuals the audience is made of, and allows to produce name tags for all attendees so that it becomes easier to identify each other. The registration is free - and so is the conference (except for the concerts). The data you enter here is purely for our own informational purposes, and will never be given away or sold to anyone. If you register, no confirmation of any kind will be sent to you. You can even completely omit the E-Mail address, but providing it makes it easier for us to tell if there's a real human behind a registered identity or rather a robot/spambot." So, there you have it. Go ahead, read, register and come :-) Thanks for reading, The LAC05 organization team: Götz Dipper (ZKM) Frank Neumann

20 years, 1 month

[linux-audio-dev] forget rosegarden, muse, softwerk, seq24 ...

by Paul Davis

http://musicthing.blogspot.com/2005/02/hamster-powered-midi-sequencer.html

20 years, 1 month

[linux-audio-dev] [PATCH] jack.plumbing should not die

by Martin Habets

Sometimes jack fails to make a connection. jack.plumbing dies when this happens. Quite inconvenient as I usually don't notice for a while, have to figure out what happened and restart jack.plumbing. There is no reason for jack.plumbing to die because of this. It can try to connect again later, when hopefully it is allowed. Patch #1 attached fixes this issue. While I'm at it: I was getting sick and tired of seeing Rule file not modified: '/etc/jack.plumbing'. Rule file not modified: '/home/mhabets/.jack.plumbing'. all the time in my logging window. So patch #2 removes this info. It seems totally useless info to me anyway. Hopefully you find these usefull. Below is some before and after data. Thanks, Martin Habets --------------------------------------------------------------------------- Before: Rule file not modified: '/etc/jack.plumbing'. Rule file not modified: '/home/mhabets/.jack.plumbing'. Rule file not modified: '/etc/jack.plumbing'. Rule file not modified: '/home/mhabets/.jack.plumbing'. Rule file not modified: '/etc/jack.plumbing'. Rule file not modified: '/home/mhabets/.jack.plumbing'. Rule file not modified: '/etc/jack.plumbing'. Rule file not modified: '/home/mhabets/.jack.plumbing'. Connect: 'sooperlooper_1:loop0_out_1' -> 'alsa_pcm:playback_1'. cannot connect ports owned by inactive clients; "sooperlooper_1" is not active jack_connect() failed: 'sooperlooper_1:loop0_out_1' -> 'alsa_pcm:playback_1' jack.plumbing dies After: cannot connect ports owned by inactive clients; "jack_rack_5735" is not active cannot connect ports owned by inactive clients; "jack_rack_5735" is not active cannot connect ports owned by inactive clients; "jack_rack_5735" is not active Connect: 'jack_rack_5735:out_1' -> 'alsa_pcm:playback_1'. cannot connect ports owned by inactive clients; "jack_rack_5735" is not active jack_connect() failed: 'jack_rack_5735:out_1' -> 'alsa_pcm:playback_1' Connect: 'jack_rack_5735:out_2' -> 'alsa_pcm:playback_2'. cannot connect ports owned by inactive clients; "jack_rack_5735" is not active jack_connect() failed: 'jack_rack_5735:out_2' -> 'alsa_pcm:playback_2' **** alsa_pcm: xrun of at least 18.475 msecs **** alsa_pcm: xrun of at least 0.257 msecs Connect: 'jack_rack_5735:out_1' -> 'alsa_pcm:playback_1'. Connect: 'jack_rack_5735:out_2' -> 'alsa_pcm:playback_2'.

20 years, 1 month

[linux-audio-dev] ICMC2005 Paper Deadline less than 10 days away!

by Pau Arumi

Please note that the ICMC 2005 ( September / Barcelona ) paper submission is less than 10 days away! We urge everyone to post their papers to the suvisoft system as soon as possible to prevent any last minute problems. For details on submissions see http://www.icmc2005.org/ You can also contact Bram de Jong <bdejong(a)iua.upf.es> if you need more details or extra information. kindest regards, The ICMC 2005 team

20 years, 1 month

[linux-audio-dev] [ANN] pkaudio-0.2

by Patrick Stinson

Project: The PKAudio library (pkaudio) Package: pkaudio-beta Date : 2005-02-23 23:08 Project "The PKAudio library" ('pkaudio') has released the new version of package 'pkaudio-beta'. You can download it from SourceForge.net by following this link: <https://sourceforge.net/project/showfiles.php?group_id=118794&release_id=30 7936 or browse Release Notes and ChangeLog by visiting this link: <https://sourceforge.net/project/shownotes.php?release_id=307936>

20 years, 1 month

[linux-audio-dev] Weird error using vstserver

by Ivica Ico Bukvic

Hi all, I was just wondering whether anyone had an idea what could be done with the following error: 1) I start vstserver (all is installed fine from Thac's rpms on Mdk 10.0 box) 2) I get the usual info about trying to re-run the vstserver if it hangs for 40 secs or if it continually tries to reload the same plugin 3) The next message is something like this (sorry currently away from my Linux box): Trying to load NorthPole.dll wine: L"E://whatever-path/NorthPole.dll" is not an executable and keeps retrying approx. every 10 seconds. Obviously following the initial advice I try to restart vstserver, but no matter how many times I try it keeps failing in the same way. Vstserver version is 0.3.1. Wine is ~April 2004 (whatever Thac has). Jack_fst works just fine. $VST_PATH is properly set. Any ideas? Many thanks! Best wishes, Ivica Ico Bukvic, composer & multimedia sculptor http://meowing.ccm.uc.edu/~ico/ -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 266.2.0 - Release Date: 2/21/2005

20 years, 1 month

[linux-audio-dev] [ANN] jack_convolve-0.0.6

by Florian Schmidt

Hi, this release adds another dependency: libDSP 5.0.1. This version of libDSP provides an optimized complex multiply-add which drops dsp usage for a 1 sec stereo IR from 14 to 11% on my 1.2 ghz athlon (133mhz sdram) at a jack periodsize (= partition size) of 2048 frames.. grab it at: http://www.affenbande.org/~tapas/wiki/index.php?jack_convolve -- Palimm Palimm! http://affenbande.org/~tapas/

20 years, 1 month

[linux-audio-dev] SooperLooper 1.0.0beta28 released

by Jesse Chappell

I know some word of mouth has already gone around about the new SooperLooper, but I might as well make a public announcement about it sometime. That time is now. http://essej.net/sooperlooper/ SooperLooper is a live looping sampler capable of immediate loop recording, overdubbing, multiplying, reversing and more. It allows for multiple simultaneous multi-channel loops limited only by your computer's available memory. The feature-set and operation was inspired by the impressive Gibson Echoplex Digital Pro (EDP). When used with a low-latency audio configuration it is capable of truly realtime live performance looping. SooperLooper is currently supported on Linux/Unix and OS X platforms that support JACK (http://jackit.sf.net). The application is a standalone JACK client with an engine controllable via OSC and MIDI. It also includes a GUI which communicates with the engine via OSC (even over a network) for user-friendly control on a desktop. However, this kind of live performance looping tool is most effectively used via hardware (midi footpedals, etc) and the engine can be run standalone on a computer without a monitor. A few sample MIDI binding presets are supplied, including a basic EDP Loop IV binding. Future plans include possible DSSI, VST or AU plugin versions for all appropriate platforms, with some reduction in flexibility from the JACK version. You might compare it to the recently released FreeWheeling, which is an excellent tool when looping with lots of multiple simultaneous loops. SooperLooper is more suited for detailed live manipulation of a given loop, although it also supports multiple simultaneous looping. This software is licensed under the GPL. You are welcome to copy it, give copies to your friends, modify it, throw it away, etc. But if you find it useful, then please consider making a donation. Please don't hesitate to give me feedback, and have fun.... Jesse Chappell

20 years, 1 month

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Linux-audio-dev February 2005