For anyone looking to quickly learn how Matt Dorrien’s second LP differs from the first, the Portland pianist and songwriter has provided some helpful hints. The first is right there in the title. His debut was In the Key of Grey, a reflection of its somber mood and post-breakup theme. This one’s called Blue Pastoral—big, expansive, rich, colorful, covering everything from fizzy samba-surf exotica to twinkling cocktail jazz.