MFPKEY_WMAAECMA_MICARRAY_DESCPTR Property

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Specifies the microphone array geometry for the Voice Capture DSP.

Constant for IPropertyBag

Available only by using IPropertyStore.

Data Type

VT_BLOB

Remarks

The value of this property is a KSAUDIO_MIC_ARRAY_GEOMETRY structure. This structure is defined in the header file KsMedia.h. To get the microphone array geometry, query the audio device for the KSPROPERTY_AUDIO_MIC_ARRAY_GEOMETRY property by calling the IKsControl::KSProperty method on the device. For more information on microphone arrays, download the white paper How to Build and Use Microphone Arrays for Windows Vista. The IKsControl interface is documented of the DirectShow SDK documentation.

Set this property if you are using the DSP in filter mode and microphone array processing is enabled. If you are using the DSP in source mode, the DSP automatically queries the device for the geometry information.

Applies To

Requirements

Client: Requires Windows Vista or Windows XP.

Header: Include wmcodecdsp.h and KsMedia.h.

See Also