Dear All, I am trying to get the property KSPROPERTY_RTAUDIO_BUFFER_WITH_NOTIFICATION but the KSRTAUDIO_BUFFER had the buffer size as 0.I am not sure why the driver is faling to allocate cyclic buffer.I tried with the two sizes : 1024 and 2048.But still it returned 0 bytes.Anybody experimented it before. Initially when i tried with KSPROPERTY_RTAUDIO_BUFFER by giving 2048 bytes,it allocated 4096 byes sucessfuly.When i switched to KSPROPERTY_RTAUDIO_BUFFER_WITH_NOTIFICATION it returned 0 bytes. If anybody have any idea pls let me know. Thanks Lokesh