“Exhilarating.” Any or all of these adjectives could describe the folk-rock sound created by Sarah Lee Guthrie and Johnny Irion (eye-ree-un). The musical richness and psychological depth of their initial collaboration, the fittingly titled Exploration, is irrefutable proof that the disarming granddaughter of Woody/daughter of Arlo and the prodigious South Carolinian quite naturally bring out the best in each other.

The material – 11 originals plus a previously unrecorded Pete Seeger song – ranges... more