[ARMedslack] Improving USB audio sound quality on the Dockstar

[Thorsten Mühlfelder]

Hi,

I'm using a high quality USB audio device (Burr-Brown Japan PCM2702) with my 
Dockstar. I've configured mpd to use the hardware interface without dmix 
because dmix seems to be broken on the ARM platform.

But there is one problem left: sometimes clicks and pops can be heard. They 
appear randomly up to 2 times a minute. My impression is that hard disk data 
transfer causes them, because using "hdparm -t" makes the situation worse. On 
the Dockstar all USB devices are connected via hub to the same USB 
controller:
# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 001 Device 003: ID 0bc2:2120 Seagate RSS LLC 
Bus 001 Device 005: ID 08bb:2702 Texas Instruments Japan Speakers

Is it possible to give the USB audio data transfers a higher priority?

-- 
Thorsten Mühlfelder
Salix OS: www.salixos.org