MFPKEY_WMAAECMA_FEATR_ECHO_LENGTH Property
Specifies the duration of echo that the acoustic echo cancellation (AEC) algorithm can handle, in milliseconds.
Available only by using IPropertyStore.
VT_I4
256
The AEC algorithm uses an adaptive filter whose length is determined by the duration of the echo. It is recommended that applications use one of the following values:
- 128
- 256
- 512
- 1024
The default value is 256 milliseconds, which is sufficient for most office and home environments. Before setting this property, you must set the MFPKEY_WMAAECMA_FEATURE_MODE property to VARIANT_TRUE.
The DSP uses this property only when AEC processing is enabled.
Minimum supported client |
Windows Vista |
Minimum supported server |
Windows Server 2008 |
Header |
Wmcodecdsp.h |
Send comments about this topic to Microsoft
Build date: 4/7/2010