From: w_r_nestor(a)hotmail.com
To: linux-audio-user(a)lists.linuxaudio.org
Subject: jackd -r | PD -rt
Date: Sun, 2 Mar 2008 20:45:32 -0500
Hi All,
I'm new to the list and I have a lot to learn from you all I am sure. I've been pursuing and open-source audio studio for a while now, and I am almost there. I'm running a G3/500mhz 'pismo' powerbook with eho audio's Layla24.
My question today involves PureData and jack. Some background first. I have had success compiling a custom rt patched kernel 2.6.23.1-rt11, as well as the neewest kernel. I have set up PAM to allow realtime privileges to my user and groups in /etc/security/limits.conf. I've also changed the priority of softirg- stuff to 99 with chrt.
As far as I know, all this should give a working non-root realtime system. My problem comes when working In my main environment: PD. I am working with the snd-layla24 driver and qjackctl. I've been able to get jack running with -R enabled. However, when I launce pd with the -rt flag, I get horrible A/D/A sync issues resulting in *UNINTENTIONAL* crackles and pops (as opposed to the intentional ones I'll make as soon as this is running). Worst of all, there are no Xruns at all. Before I messed with pam, I was getting very low latency running both jack and PD as root.
Does anyone have an idea for how to proceed, a idiot-proof configuration that works? Id love to eventually get <10ms at 8ch i/o.
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Hi,
This may be a long shot, but here goes...
As part of a dance-interaction piece we are developing with a dance company in
Bangalore, we are looking for someone who lives in India and who is
interested in this kind of thing and possibly, if it all works out, tour with
the company.
I will be in charge of developing the code, converting the interaction
concepts into working code for the performance, so we are looking for someone
who is willing to delve into SuperCollider [1] enough so that (s)he will be
able to set up the system for the show, and run code during the show, and
troubleshoot if necessary.
Development of the piece will be over the whole of this year, and then in the
next years the piece will (hopefully) tour.
Any other experience with software (like max, pd, processing, etc) or hardware
(electronics, sensor interfaces, wireless systems) comes in handy too.
We don't expect to find the SuperCollider-expert right away (though that would
be great if we did), so if you are just starting with SuperCollider that's
fine, you will learn along the way.
Please contact me off-list if you are interested and happen to live in India,
to get details. If you think you might know someone or have good ideas for
how to find someone, that would also be great.
sincerely,
Marije
[1] because of the technology involved, linux or mac based
Ok, to recap:
I have glibc 2.3.6, GCC 3.4.6, perl 5.8.8, scons 0.97.
QT4 compiled by myself (Slackware doesn't include QT4) and installed in
/opt/qt-4.3.2
salvuz@slack11-sal:~/tmp/jackmix-0.4.1$ export
PKG_CONFIG_PATH=/opt/qt-4.3.2/lib/pkgconfig:/usr/lib/pkgconfig:/opt/kde/lib/pkgconfig:/usr/local/lib/pkgconfig:/opt/kde/lib/pkgconfig
salvuz@slack11-sal:~/tmp/jackmix-0.4.1$ export
PATH=/opt/qt-4.3.2/bin:/usr/local/bin:/usr/bin:/sbin:/bin:/usr/X11R6/bin:/usr/games:/opt/www/htdig/bin:/opt/kde/bin:/usr/share/texmf/bin:.:/opt/kde/bin:/opt/java/bin:/opt/java/jre/bin:/opt/netbeans/bin:/opt/schily/bin:/home/salvuz/Programmi/scripts
salvuz@slack11-sal:~/tmp/jackmix-0.4.1$ scons
scons: Reading SConscript files ...
Configuring qt4muc...
Checking if the output of 'moc -v' contains 'Qt 4.' (cached) yes
Checking if the output of 'uic -v' contains '4.' (cached) yes
Checking if the output of 'rcc -v' contains '4.' (cached) yes
Done. Will define a more or less automatic environment to do all the
qt-specific stuff.
Checking for C header file stdio.h... yes
Checking for C++ header file iostream... yes
Checking for pkg-config (at least version 0.0.0)... yes
Checking for lash-1.0 (0.5.1 or higher)... yes
Checking for QtXml (4.2 or higher)... no
Checking for QtCore (4.2 or higher)... no
Checking for jack (0.100.0 or higher)... yes
Checking for QtGui (4.2 or higher)... no
(At least) One of the dependencies is missing. I can't go on without it...
salvuz@slack11-sal:~/tmp/jackmix-0.4.1$
I also tried with QT-4.2.3, same result...
--
salvuz
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thanks
gene
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Hi everyone,
I have recently been thinking about going to linux on my DAW. I currently
use fruity loops and run a winxp pro sp2, with a bunch of VST.
There have been a couple of issues which made me try to seek another O/S for
my audio. Number one is that I like to run a lot of VST, and
I also like to have my project from sequencing to pre mastering all in one
project. This, of course means a lot of CPU since i try to do as much
as possible without rendering it to .wav and back, since this takes time,
especially for little changes when mixing. Another issue is the
windows 2gig ram application limit. I hit this a couple of times and was
left in a dead end as to what to do. Vista is probably out of the option
right
now since I hate how much garbage is in there and how much cpu it needs just
to run. So I am thinking to switching to linux, but would like to
ask a couple of question. If someone can spare a couple of minutes and pass
your opinion on these subjects/questions, i would appreciate it very much.
1) How is VST adaptors for linux? I was reading there a couple of them. Has
anyone had trouble with them?
2) I assume linux is a lot better with RAM than windows, and was curious if
there are any people who are on this list
that actually switched over and could tell me if they really could "do" a
lot more in linux with the same hardware specs than in windows.
Does linux have some sort of application RAM limit?
3) What is everyone's favority sequencer for linux? I know there are a
couple of them. Which one is your favorite?
4) I have never used linux before. Would it be better for me to install
linux first and after im comfortable try audio on it?
5) I assume there are DirectX adaptor also. Correct?
6) Audio drivers? I currently own the t.c. electronic konnekt8 audio
interface and going from whats on the website they
dont have linux drivers? Could i use AISO4ALL? I used those drivers on
windows with no problems before, anyone have
any problems with them on linux?
I guess this is all for now. There are many more questions which i have, but
i will do the research for those. If someone can also
point em to some good resources on the web on linux audio i would def
appreciate it.
Thanks
Mike
Hi.
Does anyone know a tool to extract the (mono i guess) audio track from
an avi-file? A cmd-line tool would be fine as well.
--
Best regards,
Sebastian.
Web: linuxaudioblog.sternenhejim.de
ffmpeg does the trick very well.
See
http://www.catonmat.net/blog/how-to-extract-audio-tracks-from-youtube-video…
for example (or search for 'ffmpeg audio extract' on your favorite
search engine).
To extract the audio track as it is encoded (no transform,
just pure copy extract) you do:
ffmpeg -i your_video.avi -acodec copy audio.something
Maybe the .something is relevant (ie. if you say .mp3
and data is not mp3 ffmpeg would complain). I don't know.
Maybe yuu also need to set video codec to null or something
like that. Just experiment.
The advantage as compared to mplayer is that you don't decode
the audio to uncompressed pcm data, it's a raw extract.
Take care,
Cédric.
Hi
I'm running ubuntu with 2.6.22-14-rt. Suspend is not working (it never
goes into suspend, and doesn't react when I open the lid). Suspend works
fine with the non-rt stock ubuntu kernel.
Any ideas? How can I approach such a problem, I mean which files can I
look in after reboot that'll tell me something about what went wrong?
--
peace, love & harmony
Atte
http://atte.dk | http://myspace.com/attejensenhttp://anagrammer.dk | http://modlys.dk
Hi
I'm about to release "an actual CD" made only with linux tools. For the
mastering I lined up all "tunes" in ardour on on each track, and set the
locations for each tune.
I read this: http://www.ardour.org/files/manual/ch-exporting.html and it
suggests that I leave a 2 seconds space before the "first modulation"
(what ever that is), which made me align like this:
http://atte.dk/download/ardour.png.
When I export (with toc) and burn using "cdrdao write modlys.wav.cue"
the CD plays just fine, but (and this is the whole point of this mail)
when I rip it again with cdparanoia I get a silent track00 that lasts 2
seconds. Obviously I'm not interested in this this behavior on my final
CD, and am wondering what I did wrong. Any thoughts?
--
peace, love & harmony
Atte
http://atte.dk | http://myspace.com/attejensenhttp://anagrammer.dk | http://modlys.dk
