The station signed on the air in September 1948 as WISC-FM. It was mostly simulcast with sister station WISC 1480 AM (now
WLMV). WISC-AM-FM were owned by Radio Wisconsin, Inc., with offices in the Commercial State Bank Building. WISC-FM was the second commercial FM station in Madison, going on the air a year after 101.5
WIBA-FM. WISC-AM-FM slightly changed their call signs to WISM-AM-FM in 1959. They were network affiliates of the
Mutual Broadcasting System. By the late 1960s, WISM-FM had a separate
easy listening format, that was largely automated. By the 1980s, the easy listening format was attracting mostly older listeners. To gain a younger audience, WISM-FM flipped to
soft rock as "Movin' Easy 98 FM". On December 1, 1983, the station changed its call letters to WMGN with the moniker "Magic 98". The format switched to
soft adult contemporary music. Over time, the tempo picked up and WMGN became a Mainstream AC station. == Christmas Music ==