[wdmaudiodev] Re: usbaudio.sys and descriptors

  • From: Alan Davis <alan_davis@xxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Wed, 04 Nov 2015 21:05:12 +0800

Clemens thanks for your help.

I've got the driver to install successfully now. The descriptors were ok but my
driver was not responding properly when Windows tried to set the configuration.

Now it doesn't show up in The Sound applet...

On 4 Nov 2015, at 20:28, Alan Davis <alan_davis@xxxxxx> wrote:



Ok I tired setting to adaptive, no change...



On 4 Nov 2015, at 20:18, Clemens Ladisch <clemens@xxxxxxxxxx> wrote:

Alan Davis wrote:
I have not tested adding and sync

I somehow get the impression that you have no clue what I'm talking
about.

Section 4.6.1.1 of the USB Device Class Definition for Audio Devices
says:
The bmAttributes Field bits are set to reflect the isochronous type
of the endpoint. The synchronization type is indicated by D3..2 and
must be set to Asynchronous, Adaptive or Synchronous.

These types are explained in section 5.12.4.1 of the Universal Serial
Bus Specification Revision 2.0.


Regards,
Clemens
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