linuxaudio.org

Hallo,

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

quoted text
> the synaptic list. I had 2.4.27 kernel and 2.6.8.  Having now found

 ...

quoted text
> also that the 2 modules I've mentioned should really be loaded as

> default. Just giving my 2 cents worth. Hope you get it fixed. Nigel.

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

jackd 0.99.54

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. ;)
Ciao

--

 Frank Barknecht                               _ ______footils.org__
          _ __latest track: "scans" _ http://footils.org/cms/show/41