Royce joined the San Diego Chapter of the Barbershop Harmony Society in 1988 with his high school quartet, Barbershoppers Anonymous. Since that time, he has performed in and directed many groups, including singing tenor with the 1998 International Champion quartet Revival . Royce also directed the Westminster Chorus, winning the International Chorus gold medal in July of 2007.

Royce studied Choral Conducting and Jazz Studies at San Diego State University. He teaches directing and vocal pedagogy courses each summer at Harmony University and is popular coach for men and women quartets and choruses worldwide.