What version and build of Powerdirector?
What about your sound drivers in Windows?
What about updates for your version of Powerdirector?
Have there been any changes to your computer in the last few months? Windows Update?
It has to be something that changed.
Carl312: Windows 10 64-bit 8 GB RAM,AMD Phenom II X4 965 3.4 GHz,ATI Radeon HD 5770 1GB,240GB SSD,two 1TB HDs.