The connection between an individual’s mental state and the timbre of their voice is a well-established concept, often utilized intuitively by music therapists. However, this area remains underexplored from a scientific perspective. In this presentation, we will examine patterns of vocal habits through the client’s vocal apparatus and emphasize their application within music therapy and music psychotherapy as diagnostic, therapeutic, and supportive tools. Additionally, this presentation aims to provide practical instruments for incorporating voice work into music psychotherapy.