Local reggae and hip-hop artists Alcyon Massive, The T Club, Outpost, Frankie Hernandez Band, State of Jefferson, Cricket and the Cultivators and Buckle Rash will perform at 8 p.m. Saturday, April 20, for the Four Twenty Southern Oregon Mash-Up at the Historic Ashland Armory, 208 Oak St. It’s all part of videographer Michelle Bellamy’s new documentary, “A Rogue Revival.” Doors open at 6:15 p.m.; the cameras will roll at 7:15. Tickets cost $15 in advance and may be purchased at Music Coop. Tickets will cost $20 at the door. There will be a beer garden.