New Mystics combines the nostalgic folk sounds of Crosby, Stills, Nash & Young with the colorful, dreamy soundscapes of Donovan and modern acts like Fleet Foxes, Beirut and The War on Drugs. Yet despite its outwardly nostalgic, wistful aura, “Sparrows” is anything but that: New Mystics’ debut is a rejection of the past, with an eye on the future.