Linux-audio-user July 2010

linux-audio-user@lists.linuxaudio.org

129 participants
113 discussions

Re: [LAU] [Rakarrack-users] Segmentation Error

by Andrew C

Hey Teza, I beilive this is due to a config file mismatch from 0.42 to 0.58. Just remove your /home/user/.fltk/rakarrack.sf.net/rakarrack.prefs file and you should be good to go. Andrew. On Mon, Jul 12, 2010 at 7:51 PM, teza <tsaliou75(a)orange.fr> wrote: > Hi all, just upgrade from the 0.42 to 0.58 but Rakarrack won't start, in > a terminal I've got this error, > teza@teza-laptop:~$ rakarrack > > rakarrack 0.5.8_Equinox - Copyright (c) Josep Andreu - Ryan Billing - > Douglas McClendon - Arnout Engelen > Try 'rakarrack --help' for command-line options. > Erreur de segmentation > teza@teza-laptop:~$ > > Could you tell me how I can fix that. > Thanks for helping. > Regards > Teza. > > > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > Rakarrack-users mailing list > Rakarrack-users(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/rakarrack-users >

13 years, 10 months

Fwd: Yet another audio interface post

by Pedro Ferreira

Just forwarding Daniel's answer... >> > - The LEDs are controlable via the ALSA mixer/control interface (see the >> > amixer command line control interface for example) >> >> But aren't the LEDs dependent on the hardware switches? > > No, they're purley independent. You can make them show whatever you > like :) Thanks! Pedro

13 years, 10 months

jack2 set to realtime / soft mode, normal kernel ?

by Jonathan E. Brickman

I was very surprised to see Jack2 working well set to realtime + soft mode, with a normal (non-rt) kernel, giving me 2.67 ms stated latency without kernel crashes in Fedora 13. Anyone doing it this way? Anyone see disadvantages? So far it's pretty gravy for me. J.E.B.

13 years, 10 months

[OT] - Gee, Officer Krupke, I Need Those Violins

by Mark Knecht

Possibly of interest to readers here thinking back to some observations Paul and others made about live performances in the U.S. vs Europe. No idea if Linux is in use or not and truly it doesn't really matter for the sake of this story. It's getting harder and harder to be an old-school instrument player. I've seen reports of Kurtzweil being used in Chicago and here in San Jose we had short run of Wicked where it was apparently 100% GigaStudio. http://www.nytimes.com/2010/07/11/opinion/11woodiel.html

13 years, 10 months

performance tradeoffs of using ALSA dshare plugin for "envy24" soundcards?

by Niels Mayer

Assuming one just wants to route audio output directly to external mixers or soundsystems, are there any performance advantages, or disadvantages, to using ALSA's "dshare" plugin to treat multichannel soundcards as a bunch of individual devices. See ~/.asoundrc ( http://nielsmayer.com/npm/ice1724-dshare-asoundrc.txt ) below which creates five stereo alsa "devices" from a single Delta 66: 66ch12 66ch34 66ch56 66ch78 66spdif . What is the processing load and latency-implications of such a setup, versus the jack-equivalent (which is certainly more convenient for patching different connections together, as well as setting up connections not supported by the 1-to-1 alsa style connections)? I just set this up and was playing around with it on a Delta-66, where the ice1724 soundchips' digital mixer allows the various ALSA outputs to be mixed directly and then sent to "mains" output that's been patched over to the digital mixer in "envy24control". In a way, envy24control is a substitute for jack that uses the soundcard's DSP as digital mixer and patchbay. Wouldn't such a setup give fractionally lower latencies for, say, monitoring a vocalist or performer, over the jack equivalent? (more importantly, w/o jackd runninng, it's one less thing that has to "work in realtime" allowing your softsynths and samplers to "carburate freely" and/or each hog their own CPU.) leaving the ice1712 to render the results w/o further intervention.... The downside is that "dshare plugin" and its "buffer_size 256 // period_size 128" is now having the kernel copy bits, instead of jack. Is that a good or a bad thing if you're looking for audio performance in realtime? Does this mean formerly you could get away with just jackd running with realtime priority? ; whereas you'd need a realtime kernel to do the "dshare" trick reliably?? ........................... ## ## Useful suggestion from http://alsa.opensrc.org/index.php/1712_.asoundrc#2005-09-18 allowing ## M66 card to be accessed as separate devices. using dshare plugin ## ( http://www.alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html#pcm_plugins_… ) ## PCMOUT1&2: gst123 -a alsa=66ch12 http://64.12.61.1:80/stream/1046 ## PCMOUT3&4: gst123 -a alsa=66ch34 http://64.12.61.1:80/stream/1046 ## PCMOUT5&6: gst123 -a alsa=66ch56 http://64.12.61.1:80/stream/1046 ## PCMOUT7&8: gst123 -a alsa=66ch78 http://64.12.61.1:80/stream/1046 ## SPDIFOUT : gst123 -a alsa=66spdif http://64.12.61.1:80/stream/1046 ## pcm_slave.66_slave { pcm "hw:M66,0" channels 10 rate 44100 buffer_size 256 period_size 128 } pcm.66ch12_dshare { type dshare ipc_key 18273645 slave 66_slave bindings.0 0 bindings.1 1 } pcm.66ch12 { type plug slave.pcm "66ch12_dshare" } pcm.66ch34_dshare { type dshare ipc_key 18273645 slave 66_slave bindings.0 2 bindings.1 3 } pcm.66ch34 { type plug slave.pcm "66ch34_dshare" } pcm.66ch56_dshare { type dshare ipc_key 18273645 slave 66_slave bindings.0 4 bindings.1 5 } pcm.66ch56 { type plug slave.pcm "66ch56_dshare" } pcm.66ch78_dshare { type dshare ipc_key 18273645 slave 66_slave bindings.0 6 bindings.1 7 } pcm.66ch78 { type plug slave.pcm "66ch78_dshare" } pcm.66spdif_dshare { type dshare ipc_key 18273645 slave 66_slave bindings.0 8 bindings.1 9 } pcm.66spdif { type plug slave.pcm "66spdif_dshare" } ........................... Niels http://nielsmayer.com

13 years, 10 months

Re: [LAU] Linux DaftPunk-ifier?

by Xenon Mouse Radar

On 07/07/2010 10:23 AM, Atte André Jensen wrote: > On 2010-07-07 08:37, Erik de Castro Lopo wrote: > >> Its a vocoder. I googled and found this: > > Actually I think this is actually a talkbox. It's a funky thing with a > tube that goes in your mouth: > > http://www.youtube.com/watch?v=VX5v-S_jGD4 > > To add to the confusion I often use the mda_talkbox (available as native > linux vst here: http://sourceforge.net/projects/mda-vst/) which is > actually a vocoder... > > Don't know of a way to get the real talkbox sound... > http://www.thedaftclub.com/showthread.php?t=155 http://www.youtube.com/watch?v=VX5v-S_jGD4 So it is a talkbox sound, cool, I really thought they were just using vocoders :) Jeremy //////////////// Yes, I was going to mention that it's a talk box. AFAIK there is no software talk box emulator for Linux that sounds like a real talk box...maybe not even in the commercial software realm, either. A talkbox would be very difficult to emulate, and of course it would be special kind of Vocoder. Most professional pop artists use the real thing for that sound :)

13 years, 10 months

Nice drums?

by James Stone

Listening to the drumkits in hydrogen - they seem nice, but not _that_ nice. I was wondering if anyone has any recommendations for giga drums to work with linuxsampler. Ross Garfield 2 seem quite a reasonable price: http://www.bigfishaudio.com/4DCGI/detail.html?589 However, I'm not so sure how I would make use of the multi-layers or get them to sound more humanised - maybe playing with a midi keyboard? Alternatively (better) - any good soundfonts or hydrogen kits for realistic drum sounds? James

13 years, 10 months

jack2 -- session support?

by Jonathan E. Brickman

Is there a version of jack2 which does session support well? J.E.B.

13 years, 10 months

OT: mineral wars in Congo

by Renato

Hello, I know this might be very OT here, but I think anyone involved with modern technology should know about this: http://www.nytimes.com/2010/06/27/opinion/27kristof.html?_r=1&partner=rssny… regards renato

13 years, 10 months

a student performance video

by Dave Phillips

Greetings, YouTube video of one of my students performing a KT Tunstall song: http://www.youtube.com/watch?v=1hEJjHN5E4U Audio/video edited & converted with the latest Kdenlive. Best, dp

13 years, 10 months

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Linux-audio-user July 2010