One Sound ... One Guess ... and a Jackpot that Grows Daily Until Won! It’s NO secret now. Summit 107 is your home for "The Secret Sound” presented by Great Canadian Liquor Warehouse weekday mornings at 7:40 with Dennis Walker. Simply listen to Summit 107 Mornings with Dennis Walker and correctly identify the "Secret Sound" at 7:40am to win the Cash Jackpot. It's that easy!