The 990 does not support HDMI input. HDMI must be broken into the video and the audio component separately. The video input is DVI and is the same resolution as HDMI. Adapters are available to allow this change. Optical or analog inputs are available for sound processing. The 990 also does support the newer lossless audio codecs but most newer Blu-Ray players do. Most people output their video into the 990 via adapters to change it to DVI and use the optical or analog outputs to feed the 990. That way you can use the 990 for video and audio switching. Bear in mind that optical doesn't support the newer codecs but analog will if it is decoded in the disc player and input to the 990. For reference the 990 manual is available on the products page as a .pdf download.