We want to hook up an HDMI dvd player to the tv

The best way to do this is to take your OPTICAL AUDIO OUT from your TV - (if it's a newer TV) - plug it in to the OPTICAL AUDIO IN on your BOSE system, then use the 'TV' source on your Lifestyle 38 to get the sound from. I have sound for X-Box, DVD player, Blue-Ray Player and Wii being pushed through the TV back to the BOSE and it sounds great. I don't have to change the source on the BOSE very much either - except when I listen to stored music!