[linux-audio-user] Low latency USB 1.1 card?

mchristoph.eckert at t-online.de mchristoph.eckert at t-online.de
Mon Jun 13 07:17:03 EDT 2005


> Probably this (I have the same card):
> 
> 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 ..
> creating alsa driver ...
> hw:1|hw:1|1024|2|48000|0|0|nomon|swmeter|-|32bit
> control device hw:1
> configuring for 48000Hz, period = 1024 frames, buffer = 2
> periods
> Note: audio device hw:1 doesn't support a 32bit sample
> format so JACK will try a 24bit format instead
> Note: audio device hw:1 doesn't support a 24bit sample
> format so JACK will try a 16bit format instead
> nperiods = 2 for capture
> Note: audio device hw:1 doesn't support a 32bit sample
> format so JACK will try a 24bit format instead
> Note: audio device hw:1 doesn't support a 24bit sample
> format so JACK will try a 16bit format instead
> nperiods = 2 for playback
> ALSA: could not start playback (Broken pipe)
> DRIVER NT: could not start driver
> cannot start driver

I'm currently not at home, but AFAIR I got the same results except
for the nperiods which I have been told

nperiods = 4 for capture
[...]
nperiods = 4 for playback

Maybe it doesn't work due to the card only working @ 16bit instead
of 24 or 32?

BTW: Is there a way to tell JACK to use 16bit so JACK doesn't need
to find it by trial and error?


Thanks a lot & best regards

ce


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