[wdmaudiodev] Re: USB Audio Driver/Device problems

  • From: Tim Roberts <timr@xxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Mon, 09 Nov 2009 10:13:38 -0800

Steve Hayashi wrote:
> To give a bit more background, this is a device I bought many years
> ago.  The label on the bottom gives the manufacture date at Nov 2001.
> I just took it apart now.  It uses a Philips UDA1321 USB DAC and a
> Microchip 24LC16B EEPROM.  I couldn't guess where exactly the problem
> lies here without doing some component substitution, but I'm doubtful
> that I can fix any problem that's burned to silicon.  Maybe if I use a
> faster EEPROM, though it's likely that the values it needs to find are
> internal.

Operating systems and USB controllers were a lot "looser" about strict
adherence to the standards in 2001.  It's likely that the device is just
on the edge of some USB timing parameter, and it's no longer able to get
away with it.  It is time to consider a replacement.

Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.


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