Can you attach a debugger to audiosrv, trigger the crash, save a dump file, and send it to me off-list? From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Abhinav Singh Sent: Sunday, December 7, 2014 10:26 PM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] handle sampling rate change in a GFX APO hi i am trying to create a gfx apo for windows 8.1. i have managed to create and install my custom apo successfully. Everything works well until i try to change the sampling rate from the advanced tab of the speaker properties, which simply pops up a message saying 'Format not supported' and the audio service crashes. I want to support all the default sampling rate. I have already overridden the IsInputFormatSupported IsOutputFormatSupported but the engine never actually calls these methods when the sampling rate is changed. I was wondering if there is some other method which i might to override to achieve what i am trying?