[linux-audio-user] [JACK Fwd: strange-difficult to explain BUG]
marc_contrib at ramonvinyes.es
Tue Dec 21 16:17:05 EST 2004
I posted that message to the JACK list.
Anybody has the same problem?
sbdy at the JACK list said that it disappeared with kernel 2.6.10...
I have not tried this (I'll wait for the package) but I find it strange.
-------- Missatge original --------
Assumpte: strange-difficult to explain BUG
Data: Sun, 19 Dec 2004 17:14:24 +0100
A: jackit-devel at lists.sourceforge.net
>I first though it was Ardour but then I realised that I could
reproduce it under XMMS with the jack plugin....
When running jackd and using audio applications, after some time (for
example 5minutes but not always the same time), I start listening a
strange noise added to the music, then it stops, it comes again later
but after a lot of time and like this until the end of the world.
>I have recorded this noise, recording the PCM output.
you can download it under the following link:
>note that the noise is not additive, it distorsionates the music
(during the silence between tracks you cannot listen it, even if it
started already in the previous track)
When I hear the noise, if I switch to the ALSA plugin, I can hear the
music OK; but if I switch again to jack it the noise continues. The
noise stops spontaneously after some time (1minute?) independently of
the fact that I listen to music or I don't play anything. When the noise
stops Jack displays in the message window: "**** alsa_pcm: xrun of at
least 0.058 msecs". This is normal?????
>Here there are some specs of my system:
I am running the last version of jackd under Debian testing: 0.99.0-2
with parameters (through qjackctl):
/usr/bin/jackd -R -p60 -t5000 -dalsa -dhw:0 -r44100 -p512 -n2 -S -i1 -o2
(short latency: 23.2ms)
with an audigy card, with a kernel 2.6.8 + realtime module
my fstab is the following one:
maybe this explains why I am the only one (i didn't hear of anyone)
complaining about this bug?
sh-2.05b$ more /etc/fstab
# /etc/fstab: static file system information.
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
/dev/sda8 none swap sw 0 0
/dev/sda5 / ext3 defaults,errors=remount-ro 0 1
/dev/sda6 /home ext3 defaults 0 2
/dev/sda2 /winsegur vfat rw,user,exec,codepage=850,umask=000
/dev/sda1 /winxp vfat rw,user,exec,codepage=850,umask=000
/dev/hda /media/cdrom0 auto ro,user,noauto 0 0
/dev/hdc /media/cdrom1 auto ro,user,noauto 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto 0 0
/dev/sdb1 /marc vfat
00 0 0
/dev/sdb2 /home/marc ext3 noauto,user,exec 0 0
/dev/sdc1 /media/usb0 vfat
00 0 0
>It's quite annoying because this stops me to use Ardour to play live
Anyone that can help me?
P.D: the music is from the album Wave of Antonio Carlos Jobim :)
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