28 Jul
2005
28 Jul
'05
10:55 a.m.
On Thu, 2005-07-28 at 08:07 +0200, Cesare Marilungo wrote:
I solved the problem *cough* disabling the ethernet
card. Don't know why
it worked randomly yesterday.
I can confirm this problem/solution. UA25 glitchy as heck till eth0 is
disabled. I have a dell inspiron 5100 running gentoo btw.
Makes icecast streaming jackd a bit tough, but at least it works.
It works even with the nvidia accelerated driver. And
no more glitches
with -p64 -n4.
5.8ms of total latency with a USB card is better than my old Egosys 2496
(pci) which made Cubase on XP unstable with a buffer less than 512.
Interestingly, the nrpacks parameter of the snd_usb_audio module is set
to 4 (instead of 1 as people suggested on the net).
Thank you, anyway.
c.
Cesare Marilungo wrote:
Ubuntu had 2.6.10 something with realtime-lsm
module.
On Suse I haven't recompiled the kernel. Just the realtime module, with
the patched kernel.
It's the one shipped with Suse 9.3 (2.6.11.4-21.7-default).
I forgot to mention that before than that I also tried with a custom
compiled vanilla 2.4.11.7 with rt-lsm and realtime-preempt patches and
got loads of xruns.
Anyway yesterday I pushed jack settings way to 5ms latency (p128 -n3
with 24bits, 44.100k, 2 ins, 2 outs).
Is it possible to achieve such low latency for USB 1.1 card?
I doubt I had two instances of jack running, changed settings on the
frontmost qjackctl, and listened to the output from the first instance.
I disconnected and reconnected Muse and Zyn various times to change the
buffer size. And I also noticed the degradation of sound when pushing
jack settings so too far.
I haven't had any xrun. Even when connecting apps.
c.
Lee Revell wrote:
On Thu, 2005-07-28 at 01:18 +0200, Cesare
Marilungo wrote:
Hi,
I'm going crazy!!!
Last night, after some months playing with Ubuntu, I installed SUSE 9.3
on my amd64 with an Edirol UA-25. I installed the kernel source, patched
it with rt-lsm.patch, built the modules, installed ect.
Added:
Were the kernel versions different between the two systems?
USB audio is known to have some problems with older 2.6 kernels.
Lee