[AG-TECH] Dell T3500 series and clearone Chat50 or Chat150 audio issues

[Jason Bell]

Colleagues

Recently I have begun using the Dell T3500 precisions as an Access Grid
machine.  Unfortunately, I have issues when using either a clearone
Chat50 or Chat150 with the speaker audio [listen in rat] being distorted
and static, cracks and popping type sounds being introduced.  The mic
audio quality is fine.

These issues were seen using Fedora 10 and Fedora 11.

I tried upgrading to the latest ALSA drivers and "testing" kernels
without any success.

It was found (still in the initial stages of testings) that if I plugged
the Chat50 device (haven't tried the Chat150 device yet) into a USB hub,
rather than directly into the Machine, the audio issues disappeared.

It should also be noted that I have a number of Dell T3400 series
machines that don't experience these issues.

Anyway, the question I would like to ask is, has anyone used other USB
audio devices with a Dell T3500 machine?  Did you have any problems?
What type of device were you using and what operating system were you
using!

Many thanks,
Jason.

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Jason Bell, B.I.T. (Honours)

Research Systems Support Officer
Information Technology Division 
CQ University Australia

Australian Research Collaboration Service
http://www.arcs.org.au/

E-mail : j.bell at cqu.edu.au
         jason.bell at arcs.org.au
Work   : +61 7 4930 9229
Mobile : 0409 630897
Postal : Building 19
         Central Queensland University
         Bruce Highway
         Rockhampton, Queensland, Australia, 4702
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Patience is a virtue.

But if I wanted Patience,
I would have become a Doctor.
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