I have a Vivitek DLP projector that has only 1 HDMI port. I also have a Denon AVR that I am using for audio. I have a cable box, Roku, and dvd player that I would like to use with the projector. However, due to only one HDMI input, I am confused how to get the audio and the video working. Right now I have HDMI cables going from each box into the AVR and an HDMI output going into the projector HDMI port and am using a yellow AV cord from the back of each box and using that to input video data into the projector. However, I have to switch it each time I want to change what I am watching off of and the video quality is very poor. PLEASE HELP!!!!