Hey Don,
After doing some research ( and calling viewsonic) i found out the the viewsonic ppc has an audio frequency of 20khz. I got my Viewsonic ppc to work with the audio transmitter, but i only works with my samsung VCR, it doesn't work with my DishNetwork DVR, my XBox, or my LG TV. Can you please tell me why the don't work? And if the ppc has an audio frequency of 20khz about how much range should I get with the transmitter module ( my Game room is only about 10 feet).

Thanks