14 Mar
2004
14 Mar
'04
1:08 a.m.
I'm coming into this late; and I'm just got started doing Linux audio
stuff fairly recently, so I could be worse than useless here; but
anyway . . .
On Wed, 10 Mar 2004 11:03:00 +0100
"C. Villard" <chvillard(a)wanadoo.fr> wrote:
So I'm trying to launch jack and, as root, I type #jackd -d alsa -r
44100 and here is what I get :
jackd 0.95.0
Copyright 2001-2003 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
loading driver ..
apparent rate = 44100
creating alsa driver ...
hw:0|hw:0|1024|2|44100|0|0|nomon|swmeter|rt|32bit
control device hw:0
configuring for 44100Hz, period = 1024 frames, buffer = 2 periods
Couldn't open hw:0 for 32bit samples trying 24bit instead
Couldn't open hw:0 for 24bit samples trying 16bit instead
Couldn't open hw:0 for 32bit samples trying 24bit instead
Couldn't open hw:0 for 24bit samples trying 16bit instead
And I'm obliged to do a Ctrl C to stop the process and Iget the mess :
jack main caught signal 2
So, my question here is: what's the problem? This looks to me like
jackd started just fine. You told it to talk to the ALSA driver and
to use a sample rate of 44100 Hz. You didn't specify any other
parameters, so for those it used the default values. The man page
for jackd says that it first tries 32-bit samples, bouncing down
to 16-bit samples if 32 or 24 aren't possible with the soundcard
you're using. So it looks to me like it started just fine. And that
message you got when you ctrl-c'd it ("jack main caught signal 2") is
what jackd always says when I ctrl-c it. So, it looks like it started
just fine.
When switching verbose option for starting jack, jackd -vd alsa -r
44100, I get also thiese lines :
[ snip a lot of normal stuff ]
**** alsa_pcm: xrun of at least 0.912 msecs
**** alsa_pcm: xrun of at least 5.614 msecs
**** alsa_pcm: xrun of at least 27.009 msecs
**** alsa_pcm: xrun of at least 9.031 msecs
[ with load stuff snipped ]
OK, so you're getting xruns. But that doesn't say to me that jackd
isn't working -- merely that it's running suboptimally.
Or am I missing something here?
-c
--
Chris Metzler cmetzler(a)speakeasy.snip-me.net
(remove "snip-me." to email)
"As a child I understood how to give; I have forgotten this grace since I
have become civilized." - Chief Luther Standing Bear