Subject: Re: [LAU] xruns with m-audio fast track pro on fedora 8 ccrma -> kernel 2.6.22 , periods/buffer = 3 , disable system bips and esd, and proper rtirq setup

From: Rui Nuno Capela <rncbc@...> · Date: Wednesday, January 23, 2008 - 12:23 pm

On Wed, January 23, 2008 12:05, Florent Berthaut wrote:

quoted text> Hartmut Noack a écrit :

>

>> -----BEGIN PGP SIGNED MESSAGE-----

>> Hash: SHA1

>>

>> Florent Berthaut schrieb:

>>

>>> Fernando Lopez-Lezcano a écrit :

>>>

>>>> A more basic question... what parameters are you using when you

>>>> start jackd?

>>>>

>>>> -- Fernando

>>>>

>>> .jackdrc:

>>>

>>>

>>> /usr/bin/jackd -R -P70 -t1000 -u -dalsa -r44100 -p64 -n2 -D -Chw:0,1

>>> -Phw:0,0 -S -i2 -o2

>>>

>>

>> USB-Devices often perform much better with -n3. Furthermore I would try

>>  to eliminate any flag, that is not absolutely needed such as:

>>

>> /usr/bin/jackd -R -dhw:1 -dalsa -r44100 -p64 -n3

>>

>>

>> BTW: this would compute to around 4 ms latency - is that good enough

>> for you?

>>
yeah, -n3 might help, but if this is an usb device having -p64 is surely

asking for a xrun festival :) try higher buffer sizes eg. -p128 -n3 might

be the best you can get stable
ymmv

--

rncbc aka Rui Nuno Capela

rncbc@rncbc.org

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