Warren's first, professional recording session was for a new version of "The Lord's Prayer", set to an original melody, which Warren co-wrote with his friend Eric Todd. It was recorded by "Blessed Peace", a popular gospel choir at Oakwood University, at Sound Cell Recording Studio in Huntsville, Alabama. Warren created the vocal arrangement, played keyboards, and assisted Todd with the overall production. During that session, studio-owner Doug Jansen Smith took note of Warren's abilities. Soon thereafter, Warren became a regular session-performer at Sound Cell, contributing arrangements, playing keyboards, and singing on various radio and TV jingles, as well as pop, rock, country, and contemporary Christian recordings.