[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

[Rui Nuno Capela]

On Wed, January 23, 2008 12:05, Florent Berthaut wrote:
> 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 at rncbc.org