The goal of this project is to evaluate the effectiveness of music and rhythmic sensory stimulation with low-frequency sounds as an adjunctive therapy for depression. Through a systematic collection of clinical, behavioural and electrophysiological measures, the project also aims to determine the possible mechanisms that underlie the effects of music- and sound-based therapies on symptoms of MDD. In addition to measures of depression severity and symptoms, we are also interested in secondary behavioral measures addressing possible confounding variables, such as anhedonia, quality of life, and individual differences in how people experience reward and pleasure associated with music. These assessments will allow an initial investigation of the neural correlates of the therapeutic effects of music in the treatment of depression, which is greatly warranted to better understand the efficacy of music- and sound-based treatments.