His musical interests involved both playing and composing music and he decided at that stage that he would study music after graduating from high school. Knuth played the saxophone, and later the tuba, in his school band.
Musikal kanyang interes na kasangkot sa parehong laro at bumubuo ng musika at siya ay nagpasya na sa yugto na siya ay pag-aaral ng musika matapos graduating mula sa mataas na paaralan. Knuth nilalaro ang saksopon, at mamaya ang tuba, sa kanyang paaralan ng banda.