29 May
2004
29 May
'04
8:56 a.m.
Hello,
I read a lot a great thing about the audiophile 24/96 on the net, and i
decided to buy it to get better latency than my old sblive! I just
received the audiophile 24/96 and unfortunatly, i have a lot of XRuns
with when i run jackd.
I already tried the following :
- i changed irq (several changes : irq5, then irq 10)
- Disable nearly all the inboard harware (serial port, parallel port,
usb)
- i changed the Pci port
- i tried to run jackd as root
- i even tried to raise buffer at big values : 512, 1024, and even there
i have some (1 or 2) xruns
- i'm now trying with kernel 2.6.6 to see if things are better
Hardware :
MSI K7N2Delta MB
Athlon 2400
Nvidia Geforce 4mmx
Audiophile 24/96 M-Audio
Sofware :
Debian/Testing
Kernel 2.6.5
Alsa 1.0.4rc2
Realtime-Lsm 0.1.0
Do you have ideas, before i return the card to the shop ?
Regards,
Rémi Bernhard.
29 May
29 May
9:36 a.m.
On Sat, 2004-05-29 at 06:49, Remi Bernhard wrote:
oot
- i even tried to raise buffer at big values : 512, 1024, and even there
i have some (1 or 2) xruns
- i'm now trying with kernel 2.6.6 to see if things are better
Try using a 2.4.xx kernel. If you browse through the archives, you'll
see that the 2.6.x kernels aren't quite up to snuff for low latency
operation.
10:03 a.m.
On Sat, 29 May 2004 07:26:44 -0400
Doug James <dcjames(a)comcast.net> wrote:
On Sat, 2004-05-29 at 06:49, Remi Bernhard wrote:
Yes, i read the archives, and saw that someone else had a problem with
kernel 2.6 and the audiophile.
Although, some people reported that their kernel 2.6.x works better than
kernel 2.4, but they didn't say with wich soundcard. So if someone had
an audiophile with kernel 2.6.x, and no xruns, please tell me !
Regards,
Remi.
oot
- i even tried to raise buffer at big values : 512, 1024, and even
there i have some (1 or 2) xruns
- i'm now trying with kernel 2.6.6 to see if things are better
Try using a 2.4.xx kernel. If you browse through the archives, you'll
see that the 2.6.x kernels aren't quite up to snuff for low latency
operation.
10:22 a.m.
On Sat, 29 May 2004 07:26:44 -0400
Doug James <dcjames(a)comcast.net> wrote:
The Audiophile is a Envy24 card... so all other cards based on the Envy24 and
Envy24HT act the same way (i run an Envy24HT).
I tride a 2.4 kernel with the low-latency patches and had lots of problems with
xruns (JACK).
I had better results using the stock 2.6 kernels than the low-lat 2.4 (weird
eh?). But even with the 2.6 kernels i was still getting xruns.
After some searching and testing, im now using the 2.6.4 kernel patched with Con
Kolivas's staircase scheduler.
Along with setting up scheduler priorites on audio apps im no longer getting
xruns even with very small buffer sizes.
Get the patches here:
http://kerneltrap.org/blog/1292
I then set the priorites of apps like this:
schedtool -F -p 75 -n -20 -e jackd -v -t 5000 -R -d alsa -d "hw:1" -r 48000 -p
256
MWP.
On Sat, 2004-05-29 at 06:49, Remi Bernhard
wrote:
Yes, i read the archives, and saw that someone else had a problem with
kernel 2.6 and the audiophile.
Although, some people reported that their kernel 2.6.x works better than
kernel 2.4, but they didn't say with wich soundcard. So if someone had
an audiophile with kernel 2.6.x, and no xruns, please tell me ! oot
- i even tried to raise buffer at big values : 512, 1024, and even
there i have some (1 or 2) xruns
- i'm now trying with kernel 2.6.6 to see if things are better
Try using a 2.4.xx kernel. If you browse through the archives, you'll
see that the 2.6.x kernels aren't quite up to snuff for low latency
operation.
9:25 p.m.
Remi Bernhard <rgbmlist2(a)free.fr> writes:
- i changed irq (several changes : irq5, then irq 10)
the order of interrupt priority on a non-APIC machine:
0, 1, 8, 9, 10, 11, 12, 13, 14, 15, 3, 4, 5, 6, 7
0 is the highest priority
7 is the lowest priority
Therefor it would be best to put the spu on irq 8 or 9, giving it a
higher priority, atleast give it a higher priority than the other
cards on your station.
It is also wise to tune the pci latency timer so that no card can hold
the bus for a "long" period. Give the spu as much time as it needs and
the other cards very little time.
- i changed the Pci port
The trick is to get a high priority irq
- i tried to run jackd as root
The important thing is to let jack have posix 1.e capabilities
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4 comments
4 participants
participants (4)
-
Doug James -
Esben Stien -
Mark Williams (MWP) -
Remi Bernhard