[wdmaudiodev] Re: sample rate control on Vista

  • From: "Jeff Pages" <jeff@xxxxxxxxxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Wed, 19 Jul 2006 09:19:59 +1000

Mitch,

Thanks for that. I'm just wondering though what the first 8 bytes of the PKEY_AudioEngine_OEMFormat value are - the rest of it looks like a WAVE_FORMAT_EXTENSIBLE structure but I haven't been able to nut out those first 8 bytes and I can find no mention of this in the Vista Beta 2 WDK.

Jeff

----- Original Message ----- From: <wdmaudiodev-bounce@xxxxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Wednesday, July 19, 2006 4:38 AM
Subject: [wdmaudiodev] Re: sample rate control on Vista


Mmsys.cpl only shows formats that are actually supported by the device.

The driver can set the preferred format at install time using an inf.
To do this, put the following AddReg on the device interface



AddReg=OEMSettingsOverride.AddReg

;;
;; Set default format to 48kHz, 16-bit, Stereo
;;
[OEMSettingsOverride.AddReg]
HKR,"EP\\0", %PKEY_AudioEndpoint_Association%,,%KSNODETYPE_MICROPHONE%
HKR,"EP\\0", %PKEY_AudioEngine_OEMFormat%, %REG_BINARY%,
41,00,8C,70,28,00,00,00,FE,FF,02,00,80,BB,00,00,00,EE,02,00,04,00,10,00,
16,00,10,00,03,00,00,00,01,00,00,00,00,00,10,00,80,00,00,AA,00,38,9B,71

[Strings]
PKEY_AudioEndpoint_Association  =
"{1DA5D803-D492-4EDD-8C23-E0C0FFEE7F0E},2"
PKEY_AudioEngine_OEMFormat = "{E4870E26-3CC5-4CD2-BA46-CA0A9A70ED04},3"



Regards,
Mitch Rundle
Microsoft Corp.

This posting is provided "as is" with no warranties, and confers no
rights


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