Let's say the state of your HDMI setup is a divided along video and audio sides, with your audio equipment lacking enough HDMI connections (if you have any at all). In its never-ending drive to cover every conceivable signal switching/splitting/converting/extending need,
Gefen has a Digital Audio Decoder little black box just for you -- it lets you send in one HDMI audio+video signal, and spits out audio on HDMI and analog connections out back, along with a HDMI video passthrough. If the thought of trusting your audio decoding to Gefen is too much to bear, might we suggest you just try enjoying a movie or two before putting up all your audiophile-approved but HDMI-less gear up on eBay?
