Koastle are the Orange County duo of best friends Brett Beaudette and Andy Mueller, building shimmering, melodic bass music around big nostalgic drops and a deliberately cinematic sense of mood. They cut their teeth on "Koastcards," a self-imposed monthly ritual of one mix, one unofficial remix and one original track, filming the live sets in unlikely locations like an aquarium and the middle of Joshua Tree. Their 2025 debut album In The Beginning is a 15-track arc designed to play as one connected story, and the accompanying live show leans heavily on a custom lighting production that rolls into their spring 2026 tour.