Linux-audio-user July 2007

linux-audio-user@lists.linuxaudio.org

131 participants
105 discussions

by Kjetil S. Matheussen

"Thomas Vecchione" <seablaede(a)gmail.com> > > I heard Jack (jackdmp?) could only take advantage of two cores right now? No.

18 years, 7 months

[LAU] qjackctl doesn't show up in gnome pager

by Atte André Jensen

Hi Having solved the basic problem of getting audio going, the next step is the annoying fact that qjackctl doesn't appear in gnomes pager nor is it included in the list scrolled by ctrl-TAB. If I run openbox it works fine. This Ubuntu 7.04 with qjackctl 0.2.21, jack 0.102.20, and gnome (dunno which version) installed from the regular ubuntu repo. I was hoping some else experienced this oddity, and found a solution... -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://atte.dk/compositions

18 years, 7 months

[LAU] Ubuntu: changing realtime priority of irqs

by Atte André Jensen

Hi I trying out ubuntu with ubuntustudio kernel. In debian I always set the priority of the IRQ's using chrt -f -p 85 `pidof "IRQ 8"` However that doesn't work in ubuntu. The reason is that there seems to be no process named "IRQ 8": atte@ajstrup:~$ ps aux | grep -i IRQ root 3 0.0 0.0 0 0 ? SN 13:43 0:00 [ksoftirqd/0] atte 6274 0.0 0.0 2884 772 pts/0 R+ 13:51 0:00 grep -i irq Whereas on debian I would get: atte@ajstrup:~$ ps aux | grep IRQ root 18 0.2 0.0 0 0 ? S< 13:34 0:00 [IRQ 9] root 261 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ 4] root 286 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ 12] root 300 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ 1] root 608 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ 11] root 761 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ 14] root 787 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ 15] root 1592 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ 8] root 1593 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ 7] root 1683 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ 10] atte 4672 0.0 0.0 2848 704 pts/1 R+ 13:41 0:00 grep IRQ I suspect it has something to do with "ksoftirqd" which according to the man page seems to be a daemon handling irqs. http://tapas.affenbande.org/wordpress/?page_id=40 also doesn't seem to take ksoftirqd into account. So my question is: How do I set the priorities in ubuntu? Is it possible/clever/stupid to get rid og ksoftirqd and get things working the way I'm used to under debian, and if so how? -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://atte.dk/compositions

18 years, 7 months

[LAU] How do I adjust output levels so ardour doesn't clip it's input??

by Brian King

I'm using hydrogen and creox as inputs to ardour but they output at levels that make ardour clip when recording....how can I lower there output levels but maintain a high volume for jamming to??

18 years, 7 months

[LAU] KillVideGill

by lanas

Hi folks, This is one I made last year. On the evening of a September 13th to be precise. It is about the shooting at Dawson College (Montreal, Quebec). http://www.geocities.com/alf32967 Extraneous information: http://en.wikipedia.org/wiki/Dawson_College_Shooting Note: all attempts to upload a .ogg file to Geocities reported 'unsuccessful upload'. I had to convert the ogg file to mp3 to get it right. Cheers.

18 years, 7 months

[LAU] realtime visualization

by Atte André Jensen

Hi I'm gonna do a live performance (involving acoustic bass, hardware synths and alot of linux audio). I recently stumbled upon the goom visualization plugin in xmms, and since I don't have the skills or time to do much more, I thought it would be nice to hace a couple of projectors show something visuals based on what we play. However, it seems that it's not possible to run goom as a stand-alone application. Also I'd like to throw some of my own graphics in the mix as well. What are my options? -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://atte.dk/compositions -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://atte.dk/compositions

18 years, 7 months

[LAU] LVM and Linux DAW

by Victor Roetman

I found a bug with LVM and 64Studio installation, and the developers said they had never tried LVM so had never run across it. Which begs the question: Is LVM inefficient to use with a DAW? Actually, my computer has an IDE drive with LVM for the system disk, and a large SATA drive with just ext3 (no LVM) for data. I usually use LVM for my system disk and for swap because it's so much easier to manage multiple distributions that way, and resize partitions easily and quickly. So is it bad to use LVM for the DAW data disk? Is it bad to use LVM for the root disk if the audio isn't being written there? Is LVM inefficient when we are talking about things like multiple channels of audio in ardour, recording 8 channels at a time, that sort of thing? Please shed some light on this for me. vic -- -= =- vroetman(a)myrealbox.com -= =- ---AV & Spam Filtering by M+Guardian - Risk Free Email (TM)---

18 years, 7 months

[LAU] [ANN] QjackCtl 0.3.1a (unstable-qt4) crash-fix released!

by Rui Nuno Capela

Hi again, QjackCtl 0.3.1a (unstable-qt4) crash-fix released! This is an emergency crash-fix release and everyone is envited to ditch yesterdays one. The change-log just says it all: - An immediate showstopper crash upon client start was irradicated, which was affecting those with the system-tray icon disabled, as is the default (thanks to Ken Ellinwood for first reporting this sloppy one). Again, the fix source tarball is made available from: http://qjackctl.sourceforge.net http://sourceforge.net/projects/qjackctl Cheers && Enjoy, -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

18 years, 7 months

[LAU] conrcete

by Greg

Is there a good app for doing loop / sample speed / sample alignment music? Perhaps similar to acid, wihtout the automatic beat-stretching. It has been asked "is there a linux ACID" before. There isn't, but i'm interested in how people are doing this sort of music if at all.

18 years, 7 months

[LAU] Music made with Linux

by Jan Depner

The usual band of suspects: ALSA JACK Ardour LADSPA JAMin Katrina is a song I wrote about a week after the storm. This is my daughter's first experience recording so she was a bit nervous. I've licensed this under the Creative Commons Attribution-Share Alike 3.0 License so have fun. http://www.thecfband.com/Bio/MyMusic/MyMusic.html Cheers, Jan -- Jan 'Evil Twin' Depner http://myweb.cableone.net/eviltwin69 "Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, chardonnay in one hand, chocolate in the other, body thoroughly used up, totally worn out, and screaming 'WOO HOO, what a ride'"

18 years, 7 months

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Linux-audio-user July 2007