I am using my custom WMA and WMV filters and using a test application to verify my filters for playback and seek-to-time features. I start playback by calling "RenderFile" and "Run" methods and playback begins without any problem. After 10 seconds I seek by 75 seconds using "SetPositions" and "GetState" methods. This time audio stops and video continues to play. After another 10 seconds I call another "SetPositions" method and audio comes back. If I repeat the above experiment with same seek position values, audio stoppage problem occurs randomly. Also if I call a "printf" in my WMA transform call, it shows that tarnform is not getting called during the audio stop period. Can anyone help me in understanding what this is happening? Also please help me to find out some debugging approach as I am clueless on what to suspect (since transform is not getting called). Best regards.