Linux-audio-user July 2005

linux-audio-user@lists.linuxaudio.org

191 participants
230 discussions

[linux-audio-user] icecast and LAC2005

by Eric Dantan Rzewnicki

Hi, I gave a talk at last month's DCLUG[0] meeting on icecast and how we used it at LAC2005[1]. I was trying to stream the talk live while also trying to give the talk and host the meeting. I had the streaming working fine, but then hosed my laptop trying to get the video output to cooperate with the projector. I guess that should teach me to not try to stream and present using the same box. 8-) Fortunately we had tape running. I finally had time to get those encoded and up on the web: http://techweb.rfa.org/images/dclug/DCLUG-2005-06-08-icecast-and-lac2005-ta… http://techweb.rfa.org/images/dclug/DCLUG-2005-06-08-icecast-and-lac2005-ta… My talk started about 30% into the first tape. Przemek, the LUG organizer, stalled for me for a bit while I tried frantically to recover my laptop. Anyway, there they are. I welcome any feedback. The second tape is mostly about Linux Audio. I'm sure I made numerous glaring omissions and stated at least a few fallacies. I want to clear up anything I'm misunderstanding. There are obvious glaring problems with the production quality. Mostly these have to do with there not being a camera operator most of the time. I'm mostly interested in comments on the content of the presentation. Thanks. [0] http://dclug.tux.org [1] http://lac.zkm.de -- Eric Dantan Rzewnicki | Systems Administrator Technical Operations Division | Radio Free Asia 2025 M Street, NW | Washington, DC 20036 | 202-530-4900 CONFIDENTIAL COMMUNICATION This e-mail message is intended only for the use of the addressee and may contain information that is privileged and confidential. Any unauthorized dissemination, distribution, or copying is strictly prohibited. If you receive this transmission in error, please contact network(a)rfa.org.

20 years, 2 months

[linux-audio-user] 2x RME Multifaces, ALSA, JACK & Ardour -> XRUNS?

by Edwin Peer

Hello LAU, I've been battling with this problem for about a week now, have searched all over the place and have still not found a solution. I'm hoping somebody on this list can help me out... Hardware is as follows: Dell PE1800 Dual 2.8GHz EM64T w/1GB RAM PERC4/SC RAID5 (configured with write-back caching - bonnie++ reports 50MB/s block writes) 2x RME Multifaces (configured with Word clock sync/ADAT fiber cable for sync) OS Specifics: Gentoo Linux (fairly conservative CFLAGS=" -march=k8 -O3 -pipe") Kernel version 2.6.12 XFS / filesystem Goal: Record 16 tracks using the 8 analogue inputs of the each of the two cards simultaneously in ardour without any XRUNs. Symptoms: qjackctl reports hundreds of XRUNs when the system is sitting idle with nothing more than the window manager (KDE 3.4.1) and Jack running. I can get ardour to record if I tell it to ignore XRUNs, but that's obviously not what I want. Strange thing is that jackd -v doesn't always report XRUNs that ardour and qjackctl seem to complain about. The different things I've tried: 1) Ingo Molnar's realtime-preempt-2.6.12-final-V0.7.51-06 patch (could only get it to compile with full preempt on x86_64). I've tried this as well as the standard Gentoo sources kernel without the patch - no apparent difference. 2) With and without realtime-lsm (I tried using rtlimits too, but I'm not sure that I had it setup correctly). The problem still occurs even if I run everything as root - so I don't think it's a permissions/capabilities problem. I've also tried various chrt -f priority levels for everything, including using chrt -f -p 99 on the sound card IRQs. Strange thing is that half of the KDE stuff (like kicker) also shows up with PR = RT in top, but chrt reports SCHED_OTHER, priority 0 for all of these. 3) Synchronising the two multifaces with Word clock (at 48kHz) as well as ADAT in (at both 48 and 96kHz). The problem is worse at 96kHz but it happens at 48kHz too - ultimately I would like to run a 96kHz configuration, but I thought I'd try 48 too. 4) Various jackd settings (including various -R -P ? optional as well as all -p options). Problem still occurs with -p 8192. 5) Various configurations in /etc/asound.conf for binding the two cards together, but I must admit I don't really know what I'm doing here and everything has been pieced together from examples on the web. I've attached the current version of the file which has options for the 48 and 96kHz configurations of the multifaces. I've also tried leaving the ADAT and SPDIF channels out of the configuration, since I'm only interested in the analogue inputs. 6) Tried jack and ardour without KDE running (under TWM) - no funny processes with RT Priority in top, but problem still persists. I suspect it may only be a bug in top tho', since chrt still shows sensible stuff. 7) I couldn't install Gentoo's media-sound/alsa-driver package against the Ingo Molnar patched sources, but the problem is still there when I compile alsa-driver separately (version 1.0.8 and 1.0.9b) using the standard gentoo kernel sources. 8) With and without NPTL (I had NTPL enabled glibc installed until I read about possible problems with it). I tried the LD_ASSUME_KERNEL work around first and eventually even recompiled glibc with USE=-nptl. 9) Tried taking qjackctl out of the loop - running jackd manually - same problem with ardour. 10) Recording all 18 channels with only one of the two multifaces configured (tested both of them) works fine in all of the above configurations that I tried it with - including without Ingo's RT patches. I'm now totally lost. I've eliminated everything I can think of and don't know what to try next. Any help would be greatly appreciated. Thanks. - Edwin -- #include http://www.peer.co.za/~espeer/disclaimer.html

20 years, 2 months

[linux-audio-user] Re: linux-audio-user Digest, Vol 22, Issue 26

by Kevin Sookocheff

> The crashing with the notes of the guitar at the end? Or the rolling > repeat just before it? The rolling repeat. This is a very minor criticism though (not really a criticism even, just something to try and see how it sounds). I really like the song though. Kevin

20 years, 2 months

[linux-audio-user] 96/24 DVD-player-acceptable burning

by Andrew Gaydenko

I have grabbed plenty of LPs in 96/24 format. Subj. - is it possible?

20 years, 2 months

Re: [linux-audio-user] [offlist] Re: Mellotron sounds

by Greg Wilder

I'd be very interested in reading the research papers. Greg -----Original Message----- From: Juhana Sadeharju <kouhia(a)nic.funet.fi> Date: Fri, 8 Jul 2005 14:28:17 To:linux-audio-user@music.columbia.edu Subject: [linux-audio-user] [offlist] Re: Mellotron sounds >From: Neil Durant <lists(a)sphere3.co.uk> > >I'd be happy to sample the full lengths of all 35 notes for all six sounds, >storing them as wavs. I don't have a lot of spare time these days, so I'll >let someone else have the pleasure of cropping/editing! Please do so. Make the files available from your site or upload to ftp://ftp.funet.fi/incoming/audio/ Note: If we end up to conclusion that the samples cannot be put freely available, then I could make the samples privately available for the following kind of project. Research experts should analyse the sounds and come up with synthesis method which generates as similar sounds as possible. I'm aware of such research teams and I could ask them to analyse the samples. I also have a plenty of research papers on such analysis/synthesis methods. I could place the papers privately available for anyone who wish to write the analysis/synthesis software. Regards, Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software 215-205-2893 www.gregwilder.com

20 years, 2 months

[linux-audio-user] Re: More output

by Kevin Sookocheff

Yes very nice, very nice. I really like the "ecclectic guitar". I don't have many criticisms but you might want to try getting rid of the "echo" of last measure of some of the drum loops and see how it sounds. If that makes sense. Keep it up, Kevin

20 years, 2 months

[linux-audio-user] swh plugins - multiband eq problems

by Peter Lutek

greetings! is anyone else having problems with steve harris' multiband eq plugin? always, when using it, there are xruns on playback start and stop -- that i can deal with. but, occasionally (i suppose it's related to a certain combination of settings, but i've not narrowed it down), it starts a massive xrun cascade (into the tens of thousands in a few seconds, continuing even after playback has stopped) and that blocks playback --- i'm using it in ardour. when i remove the plugin and reload the session, everything is fine. i've got swh plugins v0.4.13-1, from the planet-ccrma repository. is this something peculiar to me, or perhaps a bug? -p

20 years, 2 months

[linux-audio-user] audacity jack

by Eric Robert

I recently made a rpm of audacity that works with jack, for my distro (mandrake 10.0). The build went fine, but when i open a sound file (i tried various formats, wav and mp3) i can read it when i click on "play", but if i stop and reclick on "play", the cursor goes as normal (as it seems) but the sound seems "stuck" repeatedly on last "note" played the first time! hope it's clear enough ;-) Has anyone met the same pb? Has anyone used audacity with jack successfully? Thanks for any advices Eric

20 years, 2 months

[linux-audio-user] [ANN] A/DeMuDi 1.2.1 is out

by The AGNULA Team

+-----------------------------------------------------------------+ | ______ ______ _ _ _ | | /\ / _____) ___ \| | | | | /\ | | / \ | / ___| | | | | | | | / \ | | / /\ \| | (___) | | | | | | | / /\ \ | | | |__| | \____/| | | | |___| | |_____| |__| | | | |______|\_____/|_| |_|\______|_______)______| | | | +-----------------------------------------------------------------+ [Sorry for cross-posting. Feel free to forward around] Florence, 07/07/2005 +++ AGNULA/DEMUDI 1.2.1 IS OUT AGNULA/DeMuDI 1.2.1, the Debian-based GNU/Linux distribution for audio, has been released. +++ AGNULA/DeMuDI 1.2.1, the Debian-based GNU/Linux distribution for audio and music, has been released. This release is the second of the 1.2.x series , and sports a complete integration with Debian, using the Sarge Debian Installer and the CDD (Custom Debian Distributions) concept. [0] Instructions on how to download and install it can be found here: http://demudi.agnula.org/wiki/InstallCdRom and a list of frequently asked questions here: http://demudi.agnula.org/wiki/DocumentsFaq The available packages along with their versions can be checked here: http://demudi.agnula.org/images/1.2.1/README.PACKAGES We hope you enjoy AGNULA/DeMuDi! Please report your impressions on our mailing lists [1] or with the issue tracking system [2] . Bug reports as well as hints and suggestions are always welcome! For any information, do not hesitate to contact us [3], or visit the AGNULA/DeMuDi site [4]. +++ About AGNULA: Agnula (acronym for A GNU/Linux Audio distribution, pronounced with a strong g) is the name of a project funded until April 2004 by the European Commission (number of contract: IST-2001-34879; key action IV.3.3, Free Software: towards the critical mass). After the end of the funded period, AGNULA is continuing as a volunteer based project, aiming to spread Libre Software in the professional audio/video arena. Best regards, -- The AGNULA Team info(a)agnula.org Our web site: http://www.agnula.org/ "There's no free expression without control on the tools you use" [0] http://demudi.agnula.org/wiki/DocumentsConcept [1] http://lists.agnula.org/cgi-bin/mailman/listinfo/users [2] http://demudi.agnula.org/newticket [3] info(a)agnula.org [4] http://demudi.agnula.org/

20 years, 2 months

Re: [linux-audio-user] no sound card

by michel levy

Christoph Eckert wrote: > Hmmm, ISA. I know that alsaconf can handle some ISA cards, but > maybe yours needs manual adjusting. You have indicated the good solution, but unfortunately alsaconf was not in the package alsa-utils (contrary to the documentation). In order to have alsaconf, I have received an excellent suggestion of Nicolas Kowalski (VERIMAG Grenoble) : - download the source of the package alsa-utils-1.0.6 - rpm -i alss-utils-1.0.6.src.rpm which put alsa-util.spec in the directory /usr/src/redhat/SPECS - comment the line of alsa-util.spec containing rm alsaconf (and the following line after \) - rebuild the package : rpmbuild -bb alsa-util.spec the package can be found in /usr/src/redhat/RPMS/i386 (for my machine) - install it with the options -i --force With alsaconf, it's easy to find the good card (sb8) : all was nearly automatically done. I had only to select this choice of driver between the drivers for sound chips on an ISA bus. After that, it was necessary to reboot to obtain the detection of the soundcard. CONCLUSION : most of my difficulties have happened from the removal of alsaconf of the package alsa-utils, I don't understand why someone has decided to do this removal. -- Michel Levy L.S.R., Bureau C214, B.P.72 - 38402 SAINT MARTIN D'HERES CEDEX e.mail : Michel.Levy(a)imag.fr tel :(33)476514022 http://www-lsr.imag.fr/users/Michel.Levy

20 years, 2 months

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Linux-audio-user July 2005