[LAU] Decent but not necessarily pro quality USB audio for laptop?

[Arnold Krille]

On Wednesday 07 January 2009 09:04:37 david wrote:
> Arnold Krille wrote:
> > On Tuesday 06 January 2009 11:11:44 david wrote:
> >> Thanks, but 100E secondhand means it's probably well out of my price
> >> range. My laptop does have a PCMCIA slot. I have a compact flash card
> >> reader that plugs into it, but data transfers are very slow through it.
> >> I wouldn't be surprised to find that the silly laptop shares interrupts
> >> with PCMCIA, video and audio hardware!
> > You can get your surprise from a simply "cat /proc/interrupts"...
> OK, so what does the following mean:
>   16:          1   IO-APIC-fasteoi   uhci_hcd:usb1, yenta

Your pcmcia is sharing the interrupt with the first usb-port. You can use lsusb 
or usbview to see which devices you plugged in there. They will disturb your 
pcmcia-experience.

> If I have a soft synth running, big updates to the screen display will
> make it start and stop. But I'm not running an RT kernel here.

Please not that while your graphics card isn't listed in the output of "cat 
/proc/interrupts" this doesn't mean that it isn't sending interrupts. Only 
there is no driver caring about them. So it can still be that the graphics is 
disturbing your sound-interrupts...

Arnold
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