CISO-FM

CISO-FM is a Canadian radio station, which broadcasts a modern rock music format at 89.1 MHz (FM) in Orillia, Ontario. The station is branded as 89.1 Max FM.
History.
Owned by Bayshore Broadcasting, the station received CRTC approval on June 1, 2009.
The station launched in late 2010 as an adult contemporary format branded as Sunshine 89.1 We Play More!
On November 1, 2018, CISO-FM dropped its adult contemporary format and rebranded to 89.1 Max FM with a classic hits format playing the best of the 70's, 80's and 90's.
On May 17, 2019, the station changed its format to modern rock but retained its "Max FM" branding.