Linux-audio-user July 2011

linux-audio-user@lists.linuxaudio.org

103 participants
107 discussions

by Dave Phillips

Greetings, A video from a recent performance of my band playing one of my songs: http://www.youtube.com/watch?v=GqgDNiFXxPI My brother shot it with a new recorder, he doesn't quite have the audio settings optimized, but it's the best vid we've got of the band so far. Just so I wouldn't be utterly OT I did the titles and rendering with the latest Kdenlive. :) Best, dp

14 years, 2 months

2.6.39.1 threadirqs vs. the rest: some numbers

by Fernando Lopez-Lezcano

Hi all, I just built a threaded-irqs enabled 2.6.39.1 kernel and used cyclictest to try to get an initial feeling of how good it might be. Cyclictest tests scheduling delays of the kernel it is running on[*]. These tests were run on a Fedora 13 T510 Lenovo laptop, with the ugly binary Nvidia driver (caveat emptor). In the menu: 2.6.39.1 with threaded irqs and PREEMPT active 2.6.33.13-rt31 2.6.34.8-rt31 (a forward port of rt31 to 2.6.34) plain Fedora kernel (2.6.34.8-68.fc13.i686.PAE) Now, before someone points it out, this is just a synthetic test that measures scheduling latency, not a real audio application. See below for details... (look at the "Avg:" and "Max:" latency values, those are in microseconds) Unless I have done something wrong, it looks like we have a long way to go with regards to scheduling latency in anything other than 2.6.33 + rt patches. But, with threaded irqs in 2.6.39 maybe the performance with audio applications running under jack will be good anyway as we will be able to tune irq processing. Seems to me unlikely. I have not tested that yet. Tests were done after a clean reboot, initially with the machine idle and then while loading thunderbird with tons of emails and firefox with tons of pages. No audio work. YMMV... -- Fernando [*] https://rt.wiki.kernel.org/index.php/RT_PREEMPT_HOWTO ---------------------------------------------------------------------- LENOVO T510 ---------------------------------------------------------------------- 2.6.33.13-149.rt31.2.fc13.ccrma.i686.rtPAE ---------------------------------------------------------------------- $ while true ; do ./cyclictest -t1 -p 80 -n -i 10000 -l 10000 ; done policy: fifo: loadavg: 0.02 0.20 0.11 1/405 7024 T: 0 ( 7024) P:80 I:10000 C: 10000 Min: 3 Act: 75 Avg: 54 Max: 121 policy: fifo: loadavg: 0.08 0.17 0.10 2/405 7027 T: 0 ( 7026) P:80 I:10000 C: 10000 Min: 3 Act: 73 Avg: 75 Max: 126 policy: fifo: loadavg: 0.01 0.12 0.09 1/405 7029 T: 0 ( 7029) P:80 I:10000 C: 10000 Min: 3 Act: 90 Avg: 49 Max: 141 policy: fifo: loadavg: 0.37 0.21 0.12 1/405 7031 T: 0 ( 7031) P:80 I:10000 C: 10000 Min: 4 Act: 70 Avg: 76 Max: 148 policy: fifo: loadavg: 0.27 0.21 0.12 1/405 7033 T: 0 ( 7033) P:80 I:10000 C: 10000 Min: 4 Act: 46 Avg: 73 Max: 144 policy: fifo: loadavg: 0.15 0.20 0.12 1/405 7035 T: 0 ( 7035) P:80 I:10000 C: 10000 Min: 3 Act: 90 Avg: 77 Max: 142 policy: fifo: loadavg: 0.07 0.15 0.11 2/405 7037 T: 0 ( 7037) P:80 I:10000 C: 10000 Min: 3 Act: 16 Avg: 71 Max: 135 policy: fifo: loadavg: 0.05 0.12 0.10 1/405 7040 T: 0 ( 7039) P:80 I:10000 C: 10000 Min: 3 Act: 84 Avg: 72 Max: 142 policy: fifo: loadavg: 0.01 0.08 0.08 1/405 7042 T: 0 ( 7042) P:80 I:10000 C: 10000 Min: 3 Act: 105 Avg: 51 Max: 146 policy: fifo: loadavg: 0.00 0.05 0.07 1/406 7045 T: 0 ( 7044) P:80 I:10000 C: 10000 Min: 4 Act: 11 Avg: 50 Max: 121 policy: fifo: loadavg: 0.07 0.06 0.07 1/406 7047 T: 0 ( 7047) P:80 I:10000 C: 10000 Min: 2 Act: 73 Avg: 76 Max: 140 policy: fifo: loadavg: 0.01 0.04 0.06 1/406 7049 T: 0 ( 7049) P:80 I:10000 C: 10000 Min: 3 Act: 67 Avg: 70 Max: 137 policy: fifo: loadavg: 0.02 0.04 0.06 1/406 7051 T: 0 ( 7051) P:80 I:10000 C: 9573 Min: 3 Act: 68 Avg: 47 Max: 146 policy: fifo: loadavg: 0.02 0.04 0.06 1/406 7053 ---------------------------------------------------------------------- 2.6.34.8-68.fc13.i686.PAE ---------------------------------------------------------------------- $ while true ; do ./cyclictest -t1 -p 80 -n -i 10000 -l 10000 ; sleep 10; done policy: fifo: loadavg: 0.20 0.33 0.15 1/298 2559 T: 0 ( 2521) P:80 I:10000 C: 10000 Min: 3 Act: 12 Avg: 36 Max: 354 policy: fifo: loadavg: 0.34 0.30 0.16 1/332 2676 T: 0 ( 2583) P:80 I:10000 C: 10000 Min: 3 Act: 12 Avg: 31 Max: 1749 policy: fifo: loadavg: 0.39 0.38 0.20 1/350 2835 T: 0 ( 2726) P:80 I:10000 C: 10000 Min: 2 Act: 9 Avg: 33 Max: 12861 policy: fifo: loadavg: 0.11 0.29 0.18 2/350 2839 T: 0 ( 2838) P:80 I:10000 C: 10000 Min: 3 Act: 12 Avg: 43 Max: 133 policy: fifo: loadavg: 0.02 0.19 0.16 1/348 2842 T: 0 ( 2842) P:80 I:10000 C: 10000 Min: 4 Act: 75 Avg: 48 Max: 17789 policy: fifo: loadavg: 0.07 0.15 0.14 1/347 2858 T: 0 ( 2845) P:80 I:10000 C: 10000 Min: 4 Act: 56 Avg: 50 Max: 1808 policy: fifo: loadavg: 0.18 0.15 0.14 1/347 2861 T: 0 ( 2861) P:80 I:10000 C: 10000 Min: 3 Act: 11 Avg: 52 Max: 187 policy: fifo: loadavg: 0.34 0.19 0.15 1/345 2864 T: 0 ( 2864) P:80 I:10000 C: 10000 Min: 4 Act: 69 Avg: 46 Max: 119 policy: fifo: loadavg: 0.39 0.28 0.19 1/346 2869 T: 0 ( 2867) P:80 I:10000 C: 10000 Min: 3 Act: 14 Avg: 27 Max: 361 policy: fifo: loadavg: 0.10 0.20 0.17 1/347 2875 T: 0 ( 2872) P:80 I:10000 C: 10000 Min: 4 Act: 14 Avg: 31 Max: 425 policy: fifo: loadavg: 0.01 0.13 0.15 1/346 2882 T: 0 ( 2879) P:80 I:10000 C: 10000 Min: 4 Act: 58 Avg: 55 Max: 186 policy: fifo: loadavg: 0.09 0.12 0.13 1/346 2887 T: 0 ( 2885) P:80 I:10000 C: 10000 Min: 4 Act: 67 Avg: 50 Max: 129 policy: fifo: loadavg: 0.10 0.12 0.13 1/347 2890 ---------------------------------------------------------------------- 2.6.39.1-1.threadirqs.1.fc14.ccrma.i686.PAE ---------------------------------------------------------------------- $ while true ; do ./cyclictest -t1 -p 80 -n -i 10000 -l 10000 ; sleep 10; done policy: fifo: loadavg: 0.13 0.25 0.12 1/290 2279 T: 0 ( 2279) P:80 I:10000 C: 10000 Min: 5 Act: 42 Avg: 45 Max: 1015 policy: fifo: loadavg: 0.64 0.36 0.18 1/338 2567 T: 0 ( 2299) P:80 I:10000 C: 10000 Min: 4 Act: 48 Avg: 44 Max: 3124 policy: fifo: loadavg: 0.20 0.30 0.18 1/337 2583 T: 0 ( 2571) P:80 I:10000 C: 10000 Min: 3 Act: 43 Avg: 50 Max: 10301 policy: fifo: loadavg: 0.07 0.22 0.16 2/341 2592 T: 0 ( 2586) P:80 I:10000 C: 10000 Min: 5 Act: 30 Avg: 46 Max: 15227 policy: fifo: loadavg: 0.48 0.33 0.21 3/340 2602 T: 0 ( 2595) P:80 I:10000 C: 10000 Min: 4 Act: 7 Avg: 29 Max: 992 policy: fifo: loadavg: 0.17 0.28 0.21 1/340 2613 T: 0 ( 2610) P:80 I:10000 C: 10000 Min: 3 Act: 15 Avg: 32 Max: 99 policy: fifo: loadavg: 0.34 0.27 0.21 4/346 2660 T: 0 ( 2616) P:80 I:10000 C: 10000 Min: 3 Act: 14 Avg: 36 Max: 1326 policy: fifo: loadavg: 0.14 0.25 0.22 2/342 2680 T: 0 ( 2665) P:80 I:10000 C: 10000 Min: 3 Act: 14 Avg: 38 Max: 709 policy: fifo: loadavg: 0.18 0.24 0.22 1/342 2687 T: 0 ( 2683) P:80 I:10000 C: 10000 Min: 4 Act: 17 Avg: 44 Max: 17692 policy: fifo: loadavg: 0.15 0.23 0.22 1/343 2690 ---------------------------------------------------------------------- 2.6.34.8-68.rt0.3.fc13.ccrma.i686.rtPAE ---------------------------------------------------------------------- while true ; do ./cyclictest -t1 -p 80 -n -i 10000 -l 10000 ; sleep 10; done policy: fifo: loadavg: 0.19 0.30 0.13 1/355 2561 T: 0 ( 2542) P:80 I:10000 C: 10000 Min: 3 Act: 27 Avg: 33 Max: 143 policy: fifo: loadavg: 0.03 0.20 0.11 1/354 2565 T: 0 ( 2564) P:80 I:10000 C: 10000 Min: 6 Act: 15 Avg: 55 Max: 135 policy: fifo: loadavg: 0.53 0.27 0.14 3/401 2780 T: 0 ( 2568) P:80 I:10000 C: 10000 Min: 3 Act: 9 Avg: 21 Max: 134 policy: fifo: loadavg: 0.50 0.39 0.20 1/405 2899 T: 0 ( 2869) P:80 I:10000 C: 10000 Min: 3 Act: 66 Avg: 36 Max: 119 policy: fifo: loadavg: 0.13 0.28 0.18 1/404 2902 T: 0 ( 2902) P:80 I:10000 C: 10000 Min: 3 Act: 48 Avg: 31 Max: 116 policy: fifo: loadavg: 0.10 0.27 0.17 1/405 2905

14 years, 2 months

LV2 synths for Ardour 3?

by Leigh Dyer

Hi all, With Ardour 3 coming along, and looking set to support only LV2 synth plugins, I've just been writing up some notes on the various LV2 synth plugins that are around at the moment. I've listed them here: http://wootangent.net/2011/06/lv2-synths-for-ardour-3-a-list/ I hope I've covered all the big ones, but are there any that I'm missing? I'd love for this to be a handy resource for new users when Ardour hits the big 3.0. Thanks Leigh

14 years, 3 months

Problem connecting RME Multiface II and Behringer ADA8000

by Giorgio - Audiophilo

Hi all, i've recently bought a Behringer ADA8000 but i can't make it work with my RME Multiface II. I can't get any signal from the RME ADAT input. The Multiface II is set to master and the ADA8000 as slave and they are connected via wordclock and with a toslink cable (ADA8000 out -> Multiface II in). ADA8000 says it's locked, hdspconf says nothing is locked, and i have no lights on or blinking on the front panel of the Multiface II. Has anyone a clue? Thank you in advance. -- Giorgio Baù *Sound engineer* T.Rex Studio www.trexstudio.com

14 years, 3 months

3D Audio Mixing

by Reuben Martin

Don't know how many of you follow the progress of video / animation development, but Blender has a GSOC project involving 3D audio. It includes things such a audio sources moving in 3D space as well as things like the doppler effect for moving audio sources. There is an iteresting video demonstrating the current progress. http://www.blendernation.com/2011/07/30/gsoc-2011-3d-audio-tools/ -Reuben

14 years, 3 months

which packages are needed for ambisonics

by rosea grammostola

Hi, Which packages are needed for ambisonics? In other words, which packages should be in a distro, to provide people the right tools for working with ambisonics? I did a little research and found: ambdec amb-plugins ardour japa jconvolver drc aliki zita-rev1 probably: non-mixer Any missing or unneeded packages here? Thanks, \r

14 years, 3 months

sox (or other): Microsoft PCM

by Atte André Jensen

Hi all I have two files, file reports the following on them: RIFF (little-endian) data, WAVE audio, mono 44100 Hz RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 44100 Hz How can I convert the first to something that has the "Microsoft PCM, 16 bit"-part in file's output? Sox always seems to output the former... NB: It's for input into another program that is very picky with it's file type, so far it seems that only files with "Microsoft PCM..." works. -- Atte http://atte.dk http://modlys.dk

14 years, 3 months

OT: which packages are needed for ambisonics

by Ralf Mardorf

Does anybody know writings about binaural (and ambisonics) how to handle overhead and underfoot issues? I suspect that there are some tricks to handle it, even if it might be impossible to do it perfectly. I'm not especially interested in being able to produce overhead and underfoot sound, but to prevent that sound became unwanted overhead or underfoot. Friends and I did amateur microphonics in the 80's, inspired by professional recordings we heard from the 70's. Reading the web I found that it's a well known issue, but there were no hints how to handle this issue. Does it help to use some kind of software, e.g. ambisonics to calculate better binaural results? Are there any audio examples for overhead and underfoot that can be heard with stereo headphones? I had a telephone chat with somebody from the list, he will produce and send me an example, unfortunately he's on a trip (travel not drug ;) at the moment. If there should exist already such an example, it would be nice to give me a link. > Message: 5 > Date: Sun, 31 Jul 2011 13:05:22 +0200 > From: rosea grammostola <rosea.grammostola(a)gmail.com> > Subject: [LAU] which packages are needed for ambisonics > To: linux-audio-user(a)lists.linuxaudio.org > Message-ID: <4E3536F2.1090905(a)gmail.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Hi, > > Which packages are needed for ambisonics? In other words, which packages > should be in a distro, to provide people the right tools for working > with ambisonics? > > I did a little research and found: > ambdec > amb-plugins > ardour > japa > jconvolver > drc > aliki > zita-rev1 > probably: non-mixer > > Any missing or unneeded packages here? > > Thanks, > > \r > > > > ------------------------------ > > Message: 6 > Date: Sun, 31 Jul 2011 13:57:05 +0200 > From: Robin Gareus <robin(a)gareus.org> > Subject: Re: [LAU] which packages are needed for ambisonics > To: rosea grammostola <rosea.grammostola(a)gmail.com> > Cc: linux-audio-user(a)lists.linuxaudio.org > Message-ID: <4E354311.7010006(a)gareus.org> > Content-Type: text/plain; charset=ISO-8859-1 > > On 07/31/2011 01:05 PM, rosea grammostola wrote: > > Hi, > > > > Which packages are needed for ambisonics? In other words, which packages > > should be in a distro, to provide people the right tools for working > > with ambisonics? > > > > I did a little research and found: > > ambdec > > amb-plugins > > ardour > > japa > > jconvolver > > drc > > aliki > > zita-rev1 > > probably: non-mixer > > > > Any missing or unneeded packages here? > > missing: tetraproc / tetracal > > http://kokkinizita.linuxaudio.org/linuxaudio/index.html > > > ------------------------------ > > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user(a)lists.linuxaudio.org > http://lists.linuxaudio.org/listinfo/linux-audio-user > > > End of Linux-audio-user Digest, Vol 53, Issue 37 > ************************************************

14 years, 3 months

Re: [LAU] [microsound] wikileaks project

by Renato Fabbri

We are on about putting documentary material in loop in specific radio (webradio) stations. People can hear some radios, do a live mix, resulting on a new webradio station (link). This was done twice (or three times, dont recall) here in Brasil as a national activitie, always on saturdays: http://pontaopad.me/webradio-coletiva-e-difusa We called it 'collective and diffuse webradio' (translated from Brazilian Portuguese), or simply 'diffuse webradio'. I like the idea of putting Wikileaks stuff. Maybe do a special session on it or always have some wikileaks audio material. A special on the 'Collateral Murder' audio (from video)? ps. this is not only for documentary material, some musical mixes can be done. We cannot count on sync afaik... Some PD patches were made for live mixing bunch of webradios. Using Rivendell or Airtime are possibilities not yet explored afaik. This sounds really interesting. :-) 2011/7/30 Dan Graham <danalogue(a)gmail.com> > > Sounds like a fun project. > > On Sat, Jul 30, 2011 at 12:10 PM, john saylor <js0000(a)gmail.com> wrote: >> >> hey >> >> would there be interest for a wikileaks project? i thought maybe we >> could take the initial big video release >> [http://collateralmurder.org/], which has a soundtrack, and then >> further mangle it. i would also include taking the video file contents >> and somehow turning it into audio [the 'somehow' being the interesting >> part] as a legitimate entry for the project. >> >> artistic limits can be helpful, so i'd like to say any submissions >> must be less than 3 minutes in length. >> >> the extra-musical issues of privacy, war, and information control >> would also be relevant here. >> >> ? >> >> -- >> \js [http://or8.net/~johns/] : "when you're with friends, you can have >> a potato." -j.cage paraphrasing y.ono >> _______________________________________________ >> microsound mailing list >> microsound(a)microsound.org >> http://or8.net/mailman/listinfo/microsound > > > _______________________________________________ > microsound mailing list > microsound(a)microsound.org > http://or8.net/mailman/listinfo/microsound > -- GNU/Linux User #479299 skype: fabbri.renato

14 years, 3 months

Playing webM video files (with Mplayer?)

by Julien Claassen

Hello everyone! I've just seen, that youtube obviously is encouraging yet another new format on their website. Now it's webM. Is there a simple way to play these files? Again mark one restraint for my setup: It has to be commandline? Kidnest regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

14 years, 3 months

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Linux-audio-user July 2011