To summarize my view, in order of importance...
1..A center channel does wonders for imaging of the very-important soloist, vocal or instrument.
2..Surround channels give new dimension (pun) to two types of music.
a. Intimate classical chamber music, or Jazz, where the sonic perspective is that the performers are in the room with you. (As opposed to you being in their room).
b. Antiphonal music (composed for two or more separate choirs or orchestras). There was a lot of this composed in the past, but it fell by the wayside because stereo cannot reproduce it properly.
c. Ambience.
d. Improved sound (especially bass) because the speakers are driven less hard for a given room SPL.
.
1..A center channel does wonders for imaging of the very-important soloist, vocal or instrument.
2..Surround channels give new dimension (pun) to two types of music.
a. Intimate classical chamber music, or Jazz, where the sonic perspective is that the performers are in the room with you. (As opposed to you being in their room).
b. Antiphonal music (composed for two or more separate choirs or orchestras). There was a lot of this composed in the past, but it fell by the wayside because stereo cannot reproduce it properly.
c. Ambience.
d. Improved sound (especially bass) because the speakers are driven less hard for a given room SPL.
.