Specifically I have a Lexicon MC-12HD surround sound preamplifier. This is a high end piece of equipment whose technology has become dated and offers no upgrade path. It is capable of accepting combined audio/video HDMI input, processing the audio and passing video to a display through its HDMI output.
The problem began when I upgraded to a 3D capable blu-ray player and 4k enabled projector. The unit is unable to process and switch HDMI 1.4 signal. I thought I had a solution when I bought a 4K 4x4 HDMI matrix switcher with EDID management. I plugged my blu-ray player into input 1, connected the projector to output 1 and the Lexicon to output 2. When I assigned the input 1 EDID setting to either 3D pr 4k, I got a great picture on the projectpr but no sound. When I assigned a 1080P EDID setting to input 1, I got sound but no 3D or 4K images on the projector (just 1080P). I don't know enough about the EDID handshake to fully understand why the Lexicon cannot handle the more advanced HDMI protocols. I suspect it simply cannot handle the extra data and speed, but I don't believe the resolution requires splitting the audio/video input into pure audio.
Any ideas?