Subject: Re: [linux-audio-user] 24bit 96khz cards that work well
From: Brian Redfern (bredfern_AT_calarts.edu)
Date: Tue Dec 31 2002 - 03:34:27 EET
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.
On Mon, 30 Dec 2002, Anthony wrote:
> * Brian Redfern <bredfern_AT_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
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