nigel henry hat gesagt: // nigel henry wrote:
> Hi Frank. Using a dodgy kernel eh!
Not anymore since 10 minutes: Now I run my own personal kernel again like it
should be: vanilla 2.6.11-12 from kernel.org, preempt enabled.
> I've being viewing your posts , and sort of wanting to help, scanned
Actually I don't have a problem with soundcards not working, I was
just experimenting with Clemens' suggestion of using the "nrpacks=1"
option to snd-usb-audio to get the lowest possible latencies for USB.
With my new kernel with disabled USB bandwidth allocation, I'm
currently test-running alsaplayer over jackd on a cheapo Terratec
Aureon USB with jackd started as:
$ /usr/bin/jackd -R -dalsa -dhw:1 -r48000 -p128 -n3 -S
and that translates to a latency as displayed by qjackctl of 8msec.
(/me plays around with qjacktl ...)
And now it's at:
$ jackd -R -dalsa -dhw:1 -r48000 -p64 -n3 -S
Latency: 4msec, still no xruns with alsaplayer (I even switched to a
virtual console... ;)
And now: a period of 32!
$ /usr/bin/jackd -R -dalsa -dhw:1 -r48000 -p32 -n3 -S
Copyright 2001-2005 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
JACK compiled with System V SHM support.
loading driver ..
apparent rate = 48000
creating alsa driver ... hw:1|hw:1|32|3|48000|0|0|nomon|swmeter|-|16bit
control device hw:1
configuring for 48000Hz, period = 32 frames, buffer = 3 periods
ALSA: cannot set period size to 32 frames for capture
ALSA: cannot configure capture channel
cannot load driver module alsa
Ah, okay, you jus' gotta know when to stop. ;)
Frank Barknecht _ ______footils.org__
_ __latest track: "scans" _ http://footils.org/cms/show/41