WMHX (105.1 FM "Mix 105.1") is a commercial radio station licensed to Waunakee, Wisconsin and serving the Madison metropolitan area.

The station is owned by Audacy, Inc. and broadcasts a hot adult contemporary radio format, switching to Christmas music for most of November and December.

Aside from airing the syndicated Kidd Kraddick in the Morning show between March 2009 and May 2010, "Charlie FM" used no regular roster of live disc jockeys, with prerecorded voiceovers serving as the continuity element.

's "It's The End of the World As We Know It (And I Feel Fine)"), WCHY flipped to a hot adult contemporary format as "Mix 105.1", launching with Carly Rae Jepsen's "Call Me Maybe".

"Mix 105.1" aimed to position itself musically between popular competitors WZEE (Top 40) and WMGN (AC) with a playlist emphasizing current musicians including Adele, Pink, Rihanna, and Maroon 5.