▁year . ▁ ▁Prior ▁to ▁the ▁combined ▁K - Ch arts , ▁category - based ▁charts ▁were ▁used . ▁From ▁September ▁to ▁December ▁ 2 0 0 7 , ▁every ▁week ▁a ▁different ▁category ▁( Digital ▁Music ▁Ch arts , ▁K ara oke ▁Ch arts , ▁View ers ▁Cho ice ▁Ch arts , ▁Album ▁Sales ▁Ch arts ) ▁was ▁featured . ▁Techn ically , ▁each ▁category ▁would ▁only ▁be ▁featured ▁once ▁a ▁month . ▁It ▁was ▁similar ▁to ▁K - Chart ▁except ▁the ▁results ▁each ▁week ▁could ▁only ▁be ▁based ▁on ▁a ▁specific ▁chart , ▁and ▁not ▁all ▁the ▁charts ▁combined . ▁From ▁January ▁ 2 0 0 8 ▁to ▁April ▁ 2 0 0 9 , ▁two ▁charts ▁were ▁used . ▁Every ▁week , ▁the ▁Digital ▁Music ▁Ch arts ▁and ▁Album ▁Sales ▁Ch arts ▁were ▁used , ▁and ▁at ▁the ▁end ▁of ▁the ▁month ▁were ▁the ▁combined ▁charts ▁( Al bum ▁Sales ▁Ch arts ▁( 2 0 %) ▁+ ▁Digital ▁Music ▁Ch arts ▁( 5 0 %) ▁+ ▁View ers ▁Cho ice ▁Ch arts ▁( 3 0 % )). ▁In ▁May ▁ 2 0 0 9 , ▁this ▁was ▁abandoned ▁for ▁the ▁combined ▁charts ▁featured ▁every ▁week . ▁Note ▁that ▁the ▁Music ▁Bank ▁ranking ▁system ▁is ▁different ▁from ▁other ▁previous ▁and ▁current ▁tele vised ▁K - Pop ▁music ▁shows , ▁in ▁that ▁an ▁artist ▁can ▁win ▁an ▁un limited ▁number ▁of ▁times ▁for ▁the ▁same ▁song ▁( other ▁shows ▁generally ▁remove ▁it ▁from ▁the ▁charts ▁after ▁three ▁wins .) ▁While ▁other ▁music