This couple, known for modern hymn classics like “In Christ Alone” and “The Power of the Cross”, heads into uncharted waters on their latest release. The lyrics are still as Christ-focused and cross-centered as ever, but they have expanded their musical palette substantially; when Fernando Ortega and Chris Tomlin are the most pedestrian guests at the party, you know you’re in for a treat. “O Children Come” features the South African vocal ensemble Ladysmith Black Mambazo, known for their work on Paul Simon’s “Graceland” album. “Psalm 24 (King of Glory) ventures into Loreena McKennitt territory, adding a strong Turkish worldbeat influence to a rock ballad with gang vocals. Famed bassist John Pattitucci (Chick Corea, Herbie Hancock) joins them for a couple of tracks, including a live klezmer/jazz/reel hybrid medley of traditional instrumentals from across Europe. The title track expands on a century-old hymn of foreign missions to call all believers to a life of witness. This project ties into the Getty’s new “Sing!”, a two year effort to enhance congregational singing for the improvement of worship and of Christian witness to broken communities.