Fighting Addictions, Improving Lives: COmprehensive Drug Rehabilitation With Music

Inclusion Criteria: * patients seeking or receiving treatment at the recruitment site for an existing substance use disorder based on ICD-10 criteria * ≥18 years old * not currently undergoing detoxification (detoxification has been completed or is not currently planned at the time of recruitment) * any type of substance use including polysubstance and alcohol use Exclusion Criteria: * exclusively nicotine dependence * psychotic episode in the last 3 months * insufficient language skills to participate in treatment without the use of a translator * hearing impairment that considerably impairs hearing of music played at a moderate volume (not relevant if hearing is sufficiently compensated by a hearing aid) * existing diagnosis of dementia * is currently receiving music therapy or has received music therapy (i.e. at planned and reoccurring intervals, not counting single random occurrences) during the past year