To prepare for FM broadcasting, one studio was cut in half to add an FM control room, and another studio was converted to a transmitter room for WJOY's AM and FM operations. In 1967, WJOY-AM-FM broke ground on new studio facilities, including a new and taller  tower to replace the  tower being used. WJOY-FM began stereo broadcasting in 1969.
Before starting FM broadcasts, WJOY modified its studios by dividing one into an FM control area and converting another into a transmitter room for handling both AM and FM operations. Two years later, in 1967, the station built new facilities including a taller tower to replace the existing one. WJOY-FM began stereo transmissions in 1969.