▁available ▁on ▁September ▁ 1 2 , ▁ 2 0 0 6 . ▁ ▁At ▁the ▁time ▁the ▁store ▁was ▁introduced , ▁purchased ▁audio ▁files ▁used ▁the ▁A AC ▁format ▁with ▁added ▁encryption , ▁based ▁on ▁the ▁Fair Play ▁DR M ▁system . ▁Up ▁to ▁five ▁author ized ▁computers ▁and ▁an ▁un limited ▁number ▁of ▁i P ods ▁could ▁play ▁the ▁files . ▁Burn ing ▁the ▁files ▁with ▁i T unes ▁as ▁an ▁audio ▁CD , ▁then ▁re - import ing ▁would ▁create ▁music ▁files ▁without ▁the ▁DR M . ▁The ▁DR M ▁could ▁also ▁be ▁removed ▁using ▁third - party ▁software . ▁However , ▁in ▁a ▁deal ▁with ▁Apple , ▁E MI ▁began ▁s elling ▁DR M - free , ▁higher - quality ▁songs ▁on ▁the ▁i T unes ▁St ores , ▁in ▁a ▁category ▁called ▁" i T unes ▁Plus ." ▁While ▁individual ▁songs ▁were ▁made ▁available ▁at ▁a ▁cost ▁of ▁US $ 1 . 2 9 , ▁ 3 0 ¢ ▁more ▁than ▁the ▁cost ▁of ▁a ▁regular ▁DR M ▁song , ▁entire ▁albums ▁were ▁available ▁for ▁the ▁same ▁price , ▁US $ 9 . 9 9 , ▁as ▁DR M ▁encoded ▁albums . ▁On ▁October ▁ 1 7 , ▁ 2 0 0 7 , ▁Apple ▁lower ed ▁the ▁cost ▁of ▁individual ▁i T unes ▁Plus ▁songs ▁to ▁US $ 0 . 9 9 ▁per ▁song , ▁the ▁same ▁as ▁DR M ▁encoded ▁tracks . ▁On ▁January ▁ 6 , ▁ 2 0 0 9 , ▁Apple ▁announced ▁that