Frightened Rabbit’s sparkling third album is worth hearing simply for Scott Hutchison’s adorable Scottish brogue, but the quintet has a lot more going for it than charm. Mixed Drinks builds on the guitar jangle of the band’s first two outings, providing a more polished setting for Hutchison’s breathless tales of hearts on fire. Soaring tunes such as “Swim Until You Can’t See Land” and “The Loneliness and the Scream” celebrate wild-eyed romantics. When Hutchison shouts, “If you never feel bleak / Life starts to lose its taste,” his fervor is downright inspirational.