Study the specs
Inputs to the projector unit would be the final destination for the video but the audio may have a convuluted course and result in a video/audio sync problem. You didn't specify the source for the media and the outputs from that device and its content (ie Dolby, HD, 1080P etc). Many devices will not pass the Dolby and other TruSurround content onto the amplifier. Some converters may be needed as a work around for the sync faults and that won't make itself apparent until it's all installed.