It's also about formats.
For a normal impressin on how 5.1 works, a DVD player and the dts soundtrack on that would do (together with the 5.1 speaker system)
The Genesis albums were released on SACD as well (Super Audio CD), and those discs require a special player (or one which can also play them).
SACD often also have a separate standard CD layer. They are then called SACD Hybrid
All Genesis studio albums were rereleased on SACD-Hybrid/DVD in Europe and CD/DVD elsewhere.
Blu-ray players also play DVDs, so thatÄs not a problem.