Stereo to Surround in Panasonic SC-HT65
It turns out that no ffdShow setting is necessary. Using the following instructions of the page in SC-HT65 manual, I was able to get stereo to surround upmixing working. https://docs.google.com/fileview?id=0B0ywocRL7KCFMTE3Y2UzMjYtNGRlNC00MDE5LWJlMWEtNDVlMTZjZjIxMjhk&hl=en