Last week, American Idol winner Caleb Johnson returned to the show to sing his original tune "Holding On". If you watched the episode, you may have noticed an analog warmth to the song's production. That's because Caleb is a client at Southern Ground Nashville, where Studio Director and Chief Engineer Brandon Bell recorded every source on "Holding On" using Zac Brown's 48-channel API Legacy Plus.

Bell's commentary on the final result: "rockin!" You can download the song from iTunes to hear for yourself. Good luck to all the American Idol contestants!