[wdmaudiodev] (no subject)

  • From: FELIX TEPLITSKY <felixt@xxxxxxxxxxxx>
  • To: "'wdmaudiodev@xxxxxxxxxxxxx'" <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Tue, 13 Sep 2011 18:58:22 +0300

I have a very difficult problem with USB audio devices on WindowsXP.

I have many(up to 16) USB soundcards (based Micronas UAC3556b) working 
simultaneously. For low latency I used the DirectKS.

When I connected the devices through USB2.0 I got the high CPU usage (up to 
100%) in the DPCs of the System process. So, I disabled Enhanced USB 
controller, soundcards reconnected to the

USB universal host controllers and the CPU usage went down to ~15%.

Now I have another problem.

Removing the working soundcards cause the 100% CPU usage in the System process. 
The Windows hangs up.

if I connect soundcards to USB2 controller (the lower count) I can remove the 
working soundcards and Windows doesn't hangs.

Pls help

Best regards

Felix Teplitsky

This message (including any attachments) issued by RAFAEL- ADVANCED DEFENSE 
(hereinafter "RAFAEL") contains confidential information intended for a 
specific individual and purpose, may 
constitute information that is privileged or confidential or otherwise 
protected from disclosure. If you are not 
the intended recipient, you should contact us immediately and thereafter delete 
this message from your 
system. You are hereby notified that any disclosure, copying, dissemination, 
distribution or forwarding of this 
message, or the taking of any action based on it, is strictly prohibited. If 
you have received this e-mail in error, 
please notify us immediately by e-mail mailto:lawraf@xxxxxxxxxxxx and 
completely delete or destroy any and all 
electronic or other copies of the original message and any attachments thereof.

Other related posts: