Neo-trad quintet Aerialists alchemize their deep roots in Scottish, Irish, and Nordic folk traditions with post rock influences into a sound that’s ethereal yet precise, technical yet visceral. Asserting the belief that a harp can groove like a drum kit, that a fiddle can be as ferocious as a distorted electric guitar, and that traditional tunes are sturdy and flexible enough to thrive in the landscape of indie-rock instrumentation, their adventurous reimaginings of traditional music spiral outward into progressive, electrified soundscapes.