The buzzy quality of high frequency energy can add an element of auditory roughness to singing that impacts timbre and perceived style. The amount of auditory roughness in a sound varies between different styles of singing. High frequency energy is often present in rock styles of singing. The great news is that this type of auditory roughness is both exciting and the result of solid vocal technique. A voice can have roughness without have damage! This talk will explore the impact of high frequency energy on our perception of the singing voice, and how that informs our approach to teaching diverse singing styles.