Warren had an innate inclination toward jazz and complex harmony, which was evident in both his original songs and arrangements of existing songs. This inclination was met with disdain by some of the more conservative, Christian members of the Oakwood community, resulting in an ongoing struggle between figures of authority and Warren, as he attempted to express his musical ideas. At the age of 13, Warren expanded the five-voice, female vocal group to a nine-voice, mixed vocal group. This group, now called The Symbolic Sounds, sang his arrangements and compositions exclusively, and remained popular in the school and community through 1981.