My father is building a home theater system in his new home. Since it will be sound proof he wants to use the room for playing music and dancing as well. So now I am tasked to find a sound system suitable for watching movies, listening to music, as well as playing instruments. Any suggestions please? What brand is good? What kind of system is needed? What devices are essential? I imagine there needs to be a sound mixer of some kind? Thank you all, and Merry Christmas!