3 : ▁ 4 8   k Hz ▁sampling ▁rate , ▁ 1 ▁to ▁ 5 . 1 ▁( 6 ) ▁channels , ▁up ▁to ▁ 4 4 8 ▁k bit / s ; ▁ ▁D TS : ▁ 4 8   k Hz ▁or ▁ 9 6   k Hz ▁sampling ▁rate ; ▁channel ▁layout s ▁= ▁ 2 . 0 , ▁ 2 . 1 , ▁ 5 . 0 , ▁ 5 . 1 , ▁ 6 . 1 ; ▁bit r ates ▁for ▁ 2 . 0 ▁and ▁ 2 . 1 ▁= ▁ 3 7 7 . 2 5 ▁and ▁ 5 0 3 . 2 5 ▁k bit / s , ▁bit r ates ▁for ▁ 5 . x ▁and ▁ 6 . 1 ▁= ▁ 7 5 4 . 5 ▁and ▁ 1 5 0 9 . 7 5 ▁k bit / s ; ▁ ▁MP 2 : ▁ 4 8   k Hz ▁sampling ▁rate , ▁ 1 ▁to ▁ 7 . 1 ▁channels , ▁up ▁to ▁ 9 1 2 ▁k bit / s . ▁ ▁DVD s ▁can ▁contain ▁more ▁than ▁one ▁channel ▁of ▁audio ▁to ▁go ▁together ▁with ▁the ▁video ▁content , ▁supporting ▁a ▁maximum ▁of ▁eight ▁simultane ous ▁audio ▁tracks ▁per ▁video . ▁This ▁is ▁most ▁commonly ▁used ▁for ▁different ▁audio ▁formats — D TS ▁ 5 . 1 , ▁AC - 3 ▁ 2 . 0 ▁etc .— as ▁well ▁as ▁for ▁comment ary ▁and ▁audio ▁tracks ▁in ▁different ▁languages