When Ari Mason ’14 put together a biography for her website, she outlined some of her biggest strengths. Improvisation. A DIY recording approach. Music production. On-demand composition. A historical performance degree in viola da gamba from Oberlin Conservatory. At the very end of this bio, Mason added a section highlighting some of the skills most pertinent to her work. Old Norse siren calls. Creepy “ooOOooOos.” Aggressive breathing. Chanting improvised Latin words. (Real liturgical Latin, to be clear.) Hums. Throat singing. Microtonal chanting. These aren’t common résumé bullet points—but for the Los Angeles-based Mason, these things are crucial to her music contributions to film, television, and video games. She’s Grammy-certified for being the featured vocalist and a viola da gamba player on the video game Assassin’s Creed Valhalla: Dawn of Ragnarök; sang on the Emmy-nominated documentary Planet Earth III and the video game Fortnite; and contributed vocals and viola da gamba on...