30 Dec
2002
30 Dec
'02
9:40 p.m.
What I notice is that I have hiccups during recording and playback, at
first I thought my machine was just too slow for lowlatency, but I was
wrong. In my case I may do better with usb-audio, since my usb defaults to
irq 9, which is apparently the ideal irq for usb audio.
Unfortunately I don't know how to excatly quantify the problem, but what
it would appear to me is there are just conflicts between some video and
some audio chipsets. Now if I swap out my AGP video card for my old junky
card and the xruns under jack stop altogether, then I know that the AGP
Rage is a doo-doo card for video. Interesting that a more high end card
solved your problem.
From what I've read the whole issue of video/audio
problems is not a linux
specific issue, it also crops up under windows.
http://www.brianredfern.org
On Mon, 30 Dec 2002, Anthony wrote:
* Brian Redfern <bredfern(a)calarts.edu> [Dec 30
02 18:11]:
No, I think perhaps "irq hungry" is a
meaningless statement, rather
there's a nasty fight for resources between my AGP Rage card and the
Audiophile, I'm testing this simply by running Jack, and watching the
reports of xruns, the sblive is popping an xruns every twenty minutes, and
then the xrun is tiny like .009 miliseconds, while the Audiophile was
popping a 54 milisecond xrun every two seconds. The whole "irg
hungry" thing is perhaps a misnomer.
I wish this audio vs. video war could be quantified - actually
understand the reasons for it.
On one machine (celeron p3 core) I had to lose the AGP for a cheapo
PCI. On my new machine, I had to get a high end AGP to stop this. BTW
are the problems just XRUNS or do u hear garbled audio during video
activity?
--ant