[PlanetCCRMA] jack trouble

[Bruce Elliott]

Fernando Pablo Lopez-Lezcano wrote:

>> <snip>
>>
>>>loading driver ..
>>>creating alsa driver ... hw|hw|1024|2|44100|0|0|nomon|swmeter|rt|32bit
>>>configuring for 44100Hz, period = 1024 frames, buffer = 2 periods
>>>Couldn't open hw for 32bit samples trying 16bit instead
>>>Couldn't open hw for 32bit samples trying 16bit instead
>>>
>>>**** alsa_pcm: xrun of at least 0.070 msecs
>>>
>>>**** alsa_pcm: xrun of at least 0.083 msecs
>>>...
>>>      
>>>
>>Messages like the last two just keep scrolling on and on until I kill it.
>>    
>>
>Related to disk activity? Periodic?
>  
>
Seems to be random values between 0.068 msecs and 0.080 msecs.  They 
scroll at a rate of about 10 messages per second, so it's hard to tell 
what they might be responding to, in terms of disk activity.

>What soundcard do you have? I would try with different hardware
>parameters for jack. For example incrementing the number of periods (-p
>3) and/or making the buffer size bigger (or smaller). 
>  
>
I have the VT8233 AC97 Audio Controller from VIA Technologies, and use 
the via82cxxx_audio driver.
Do you mean that I should set the Frames per Second to 3 (-p 3)?  The 
default is 1024, so that seems like a big change.  Nonetheless I tried 
it and seemed to get better results, except that alsa fails now; it 
complains about the 3 fr/sec request:

[bruce at darkstar bruce]$ jackstart -R -d alsa -d hw -r 44100 -p 3
back from read, ret = 1 errno == Success
jackd 0.92.0
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 ..
creating alsa driver ... hw|hw|3|2|44100|0|0|nomon|swmeter|rt|32bit
configuring for 44100Hz, period = 3 frames, buffer = 2 periods
Couldn't open hw for 32bit samples trying 16bit instead
ALSA: cannot set period size to 3 frames for capture
ALSA: cannot configure capture channel
cannot load driver module alsa

thnx, - Bruce
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