Hi Steve,
I really appreciated your insights on adding DSP. My setup is a BV 7-40 mkIV with BL 7.4, Sonus faber Concerto fronts and BL 4000 rears, plus Apple TV 4k. After watching your video I wondered if I could use a miniDSP nanoAVR DL (https://www.minidsp.com/products/ht-series/nanoavr-dl) to connect the ATV and internal Blu-ray player to the BeoSystem 3 in the BeoVision. If it worked it should allow me to have reasonably inexpensive room correction for movies and music.
Any advice on feasibility would be appreciated.
Regards, Daniel