Well I usually have my Blu-ray drive hooked up to my Main PC, as I use it to back up and archive data. I decided I wanted to use it with my AV PC, and watch a Blu-ray movie. But when I started my movie, I had no audio out my AV speakers (S-PDIF out my PC into my AV Rx). I then had quick thought, went to the control panel, opened Manage Sound Devices, and of course my HDMI was the default device. This was putting audio through the HDMI cable to my TV speakers. So I went and made S-PDIF optical out the default device (S-PDIF my IO panel). I ran the windows test, and I got windows test chimes out my AV speakers, and figured I had solved my problem. But when I un-paused the movie, I still had no sound. This makes no sense why windows sounds are going out my AV speakers, yet sound from the movie in my BD player (hooked up via eSata ) has no sound ? ? ?