6 7 . ▁ ▁Under ▁his ▁own ▁name , ▁his ▁hosting ▁style ▁was ▁much ▁less ▁man ic ▁and ▁more ▁relax ed , ▁although ▁still ▁inform al ▁and ▁un predict able . ▁▁▁ ▁In ▁ 1 9 6 9 , ▁he ▁moved ▁to ▁C K GM ' s ▁sister ▁station , ▁C K GM - FM . ▁Mars den ▁was ▁instrument al ▁in ▁switching ▁the ▁station ' s ▁format ▁from ▁beautiful ▁music ▁to ▁free ▁form ▁progress ive ▁rock . ▁In ▁ 1 9 7 3 , ▁Mars den ▁returned ▁to ▁Toronto ▁with ▁his ▁new , ▁completely ▁different ▁on - air ▁persona ▁at ▁CH UM - FM . ▁He ▁left ▁the ▁station ▁in ▁February ▁ 1 9 7 5 ▁to ▁dev ote ▁more ▁time ▁to ▁his ▁radio ▁commercial ▁production ▁company , ▁but ▁mainly ▁because ▁of ▁the ▁tight ▁play list ▁CH UM - FM ▁was ▁making ▁their ▁DJ s ▁follow . ▁Mars den ▁refused ▁to ▁follow ▁a ▁play list ▁and ▁left ▁shortly ▁after ▁it ▁was ▁instit uted . ▁He ▁eventually ▁returned ▁as ▁an ▁on - air ▁person ality ▁at ▁CH IC - FM ▁shortly ▁before ▁it ▁was ▁transformed ▁into ▁CF N Y . ▁ ▁Cre ates ▁The ▁Spirit ▁of ▁Radio ▁After ▁CF N Y ▁program ▁director ▁Dave ▁P rit ch ard ▁left ▁the ▁station ▁in ▁ 1 9 7 8 ▁due ▁to ▁conflicts ▁with ▁the ▁station ▁management , ▁Mars den ▁was ▁promoted ▁to ▁program ▁director . ▁The ▁station ' s ▁mand ate ▁had ▁been ▁to ▁present ▁significantly ▁different ▁programming ▁than ▁other ▁radio ▁stations ▁in ▁the ▁Gre