The Guess Family is headed up by Kevin whose love of music, especially vocals, has shaped their classical a cappella sound and repertoire. Each one has developed a mature sound which is magnified and highlighted when joined with other family members' voices. Kevin sings the bass line, Angie sings alto, William sings tenor, Beth sings soprano, Sarah sings alto (and a little of everything else), and Bekah sings mostly soprano parts. Separately, the voices can have quite their own sound, from operatic to jazz, but together they blend as one sound that is difficult to dissect. The sacred music that they sing is sung with a desire for excellence for the glory of God. They have sung together since each new family member became old enough to sing a melody line. The Guess Family has traveled to sing in Russia and in the Philippines, as well as in numerous parts of the United States, and sings regularly at their home church.