 Much debate was made among the investors, but they finally settled on Unistar's (now Westwood One) "Adult Rock 'n Roll" classic rock format.On October 10, 1990, the station made its debut as WYMK, "Y-107".Prior to the station going on the air, it had been assigned the call letters WEMR-FM when the license was granted a year earlier, but these call letters would not be used on this station again until 1995, and would remain so until 2002.