Sometimes a love song is about more than romantic love. Sometimes the words and music amplify feelings of goodness and hope and faith. They turn into what could be called “the sweetest sounds,” and it is fitting that Isabella Isherwood’s album shares that title. This, her debut recording, establishes Isherwood as a major interpreter of the American Songbook. With each track, she caresses a familiar composition and discovers aspects of it that amplify its emotional resonance. She takes a love song and infuses it with all the depth of a highly personal dramatic monologue. It is a remarkable gift for such a young artist.