Linux-audio-user September 2012

linux-audio-user@lists.linuxaudio.org

98 participants
100 discussions

by Kevin Cosgrove

Hello, I'm trying to record on a new system, and I'm getting xruns. My old system produced no xruns. The problem system runs: Fedora 17 Kernel 3.5.2-3.fc17.x86_64 Ardour 2.8.14 JACK 1.9.8 Intel i7, 16GB RAM, SATA 6Gb/s drives My user ID is a member of the "jackuser" group. Jack is running as: /usr/bin/jackd \ -T -ndefault -p 256 -R -P 60 -T -d alsa -n 2 -r 48000 -p 1024 -d hw:2,0 In 43 minutes I've had almost 6700 xruns. The working system runs: Mandriva 2010.2 Kernel 2.6.33.7-server-2mnb Ardour 2.8.11 JACK 1.9.5 Intel Q9650, 4GB RAM, IDE drives Reading through the CCRMA documentation here: http://ccrma.stanford.edu/planetccrma/software/installplanetsixteen.html It looks like the kernel and jack for F17 are built for "proper realtime priority". What am I missing. Is there something I need to do beyond being a member of "jackuser" in order to operate with acceptable xruns? I think I'll go back to the old system for a while. Thanks.... -- Kevin

12 years, 10 months

Remix

by Folderol

I don't seem to be able to get involved in the music side of things much these days - too much work and not enough free time :( However, here is a revision of a very old, lazy chill-out tune of mine. It is now 100% yoshimi. http://www.musically.me.uk/music/Dreamer.ogg -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

12 years, 10 months

hdsp not happy with recent kernels

by Peter Lutek

greetings! perhaps some of you use RME hdsp hardware. i'm wondering if you're running into issues like mine with recent kernels.... i've got an hdsp multiface hanging off an expresscard adapter in a T520 thinkpad. here's what's going on: hdspmixer locks up soon after starting, saying, "HwDep ioctl failed. Metering stopped" once that has happened, if i try to start jack, i get this: plutek@palnote:~$ jackd -dalsa -D -Phw:0,0 -Chw:0,0 jackdmp 1.9.9 Copyright 2001-2005 Paul Davis and others. Copyright 2004-2012 Grame. jackdmp comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK server starting in realtime mode with priority 10 control device hw:0 control device hw:0 audio_reservation_init Acquire audio card Audio0 creating alsa driver ... hw:0,0|hw:0,0|1024|2|48000|0|0|nomon|swmeter|-|32bit control device hw:0 ALSA: Cannot open PCM device alsa_pcm for playback. Falling back to capture-only mode Cannot initialize driver JackServer::Open failed with -1 Failed to open server alternately, if i start jack after a reboot *without* first starting hdspmixer, it runs for a few minutes (variable), then fails thusly: plutek@palnote:~$ jackd -dalsa -D -Phw:0,0 -Chw:0,0 jackdmp 1.9.9 Copyright 2001-2005 Paul Davis and others. Copyright 2004-2012 Grame. jackdmp comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK server starting in realtime mode with priority 10 control device hw:0 control device hw:0 audio_reservation_init Acquire audio card Audio0 creating alsa driver ... hw:0,0|hw:0,0|1024|2|48000|0|0|nomon|swmeter|-|32bit control device hw:0 configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods ALSA: final selected sample format for capture: 32bit integer little-endian ALSA: use 2 periods for capture ALSA: final selected sample format for playback: 32bit integer little-endian ALSA: use 2 periods for playback ALSA: poll time out, polled for 31999183 usecs JackAudioDriver::ProcessAsync: read error, stopping... i'm on the aptosid distribution. alsa-tools-gui is 1.0.25-2 although running jackd says "jackdmp 1.9.9", my installed debian package is jackd2 1.9.8~dfsg.4+20120529git007cdc37-4 alsa is 1.0.23+dfsg-4 and here's the clincher: kernels up to and including 3.1-6 make it all work fine (with the same versions of other things as listed above). however, kernels 3.2.0-3 and higher all cause the issues reported above. so, i guess the bottom-line question is whether other folks are running hdsp hardware successfully on 3.2 or more recent kernels, or whether we're all stuck at 3.1 for now? amusing side-note: i'm trying to use a wacom tablet, which is fine with the 3.2 and higher kernels, but not with the 3.1 -- haha!! please let me know if you have any relevant observations on this; it'd be nice to have some reassurance that my multiface isn't seeing the beginning of the end! thanks in advance.... cheers! .pltk.

12 years, 10 months

[ANN] Praxis LIVE build:120912

by Neil C Smith

Hi All, Praxis LIVE is an open-source, graphical environment for rapid development of intermedia performance tools, projections and interactive spaces. A new build of Praxis LIVE is now available for download. While this is mainly a bug fix release, it does see the Praxis command line player added to the main installation, and work which paves the way for distributing Praxis projects as standalone applications (coming separately in the next couple of weeks). Website - http://code.google.com/p/praxis Release notes - http://code.google.com/p/praxis/wiki/ReleaseNotes Videos - http://praxisintermedia.wordpress.com/2012/07/30/video-rough-cuts-1/ If any of you who've been playing with Praxis LIVE would be interested in submitting example projects for the next release, please get in touch with me off-list. Thanks and best wishes, Neil -- Neil C Smith Artist : Technologist : Adviser http://neilcsmith.net

12 years, 10 months

lmms book

by Alexandre Prokoudine

Hi folks, It looks like PacktPub published a book on LMMS: http://www.packtpub.com/linux-multimedia-studio-complete-guide-to-dance-mus… Alexandre Prokoudine http://libregraphicsworld.org

12 years, 10 months

Frequency-selective compressor?

by Rick Green

A friend has discovered some historical recordings of his Grandfather in the Smithsonian's collection, and would like us to clean them up a bit for publication. One of the issues is that the triangle player is often off the beat with the rest of the band, and he would like us to push the triangle to the back of the mix. Is there a plugin something like a compressor coupled to a notch or comb filter that I could use to suppress the sound of the triangle within a recording of a Cajun band? -- Rick Green "Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." -Benjamin Franklin "As for our common defense, we reject as false the choice between our safety and our ideals." -President Barack Obama 20 Jan 2009

12 years, 10 months

10 years anniversary of ZynAddSubFX

by Paul N

Hi. In 25 September 2002 I released the first version of ZynAddSubFX. Now, I am glad that, after 10 years ZynAddSubFX (with its forks and other software based on it) is used by many people. For me it was one of the greatest accomplishments in my life. I want to thank to the whole ZynAddSubFX community for help. Thanks to all other developers, contributors and users. I hope that the next decade will bring more joy to anybody involved in developing or in using ZynAddSubFX. Thanks. Paul

12 years, 10 months

Problem with linuxsampler, telnet and cat

by Julien Claassen

Hello everyone! A strange problem came up. I started LinuxSampler (localhost 8888) and then I tried to load a setup like usual: cat lscp_script.txt | telnet localhost 8888 Trying ::1... Connection failed: Connection refused Trying 127.0.0.1... [well all OK from there] BUT: Nothing ets done. LinuxSampler says this: LSCPServer: Client connection established on socket:4. LSCPServer: Client connection terminated on socket:4. And nothing happens. IF I start telnet like this: telnet localhost 8888 I get the same message for a start. Then I enter each command from the script manually, everything works jsut fine. What can it be? You see me truly baffled. I didn't have that before. Best regards Julien ---------------------------------------- http://juliencoder.de/nama/music.html

12 years, 10 months

sample rate differences

by Brent Busby

Most of the documentation for Jack says that one should set Jack for a prefered sample rate, and then try to make sure all your apps connect at that rate. The problem is, much as one may prefer to work at 48kHz, it's not very likely you'll just be able to get every app to use it, especially programs like LinuxSampler that may be using Gigasampler libraries that are at 44.1kHz. If you prefer to run your hardware at 96kHz, you may be in a world where almost nothing but your own DAW tracks use that frequency. How do you all handle sampling frequency differences between apps in a Jack session. Most of the advice I see to simply "make sure that all your apps are set the same" doesn't seem very realistic. -- + Brent A. Busby + "We've all heard that a million monkeys + Sr. UNIX Systems Admin + banging on a million typewriters will + University of Chicago + eventually reproduce the entire works of + James Franck Institute + Shakespeare. Now, thanks to the Internet, + Materials Research Ctr + we know this is not true." -Robert Wilensky

12 years, 10 months

LAO scheduled downtime

by Robin Gareus

Hi all, Ico - director of linuxaudio.org - arranged to quadruple the disk-space for our servers. Amongst other things, this will allow us to host large sample-collections (an endeavor Nils has started) as well as prepare for videos from the upcoming Linux-Audio-Conference. linuxaudio.org services will be offline for 5-10 mins later today (around 45 min from now). 26/Sept - 16:00 UTC thanks for your understanding. robin

12 years, 10 months

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Linux-audio-user September 2012