"surround" - key terms from Wikipedia

analog track was dolby surround
center surround	structures
channel surround
channel surround	sound
channels surround	sound
digital track was dolby surround
discrete surround
dolby digital surround
dolby digital surround	ex
dolby surround
dolby surround	pro logic
left surround
one channel for surround	speakers
right surround
surround
surround	channel
surround	channels
surround	indicator
surround	mix
surround	sound
surround	sound album
surround	structures in the retina
track was dolby surround
two channels for surround	speakers
would surround