[linux-audio-user] USB-audio-card notches

[Christoph Eckert]

Lee,


> According to the kernel developers this is indeed the
> kernel's fault.
>
> On Wed, 2005-03-30 at 14:57 -0800, David Brownell wrote:
> "Well, I'd not yet expect USB audio to work over EHCI quite
> yet, though one of the patches Greg just posted should help
> some of the issues with full speed iso through USB 2.0
> hubs.  (At least for OUT transfers as to speakers.)"

Thanks a lot for these infos.

> Please try this patch against 2.6.12-rc1:
>
> http://cache.gmane.org//gmane/linux/usb/devel/33380-001.bin

well, did last a while. I'm not that familiar with kernel 
building. But a friend was helpful, so I have now

Linux Grandevitesse 2.6.12-rc1-ce #1 SMP Sat Apr 2 22:59:58 
CEST 2005 i686 Intel(R) Pentium(R) 4 Mobile CPU 1.60GHz 
GenuineIntel GNU/Linux

installed. Unfortunately, it doesn't change anything 
concerning the usb_audio behaviour. I get notches every 3 to 
7 seconds again caused by xruns.

Except, OTOH, I did something wrong when patching (sorry for 
my ignorance). Can I somehow check if the patch has been 
applied successfully by probing the current running kernel? A 
location in /proc probably?


 Thanks a lot & best regards


    ce