Hearing voices, singing, music or other phantom sounds. These sounds may be psychiatric (mental illness) such as caused by schizophrenia. Furthermore, they may be caused by more than 600 different drugs–especially psychotropic drugs–that produce auditory hallucinations as a side effect. However, for hard of hearing people, who experience non-psychiatric auditory hallucinations, is an auditory system that is no longer functioning quite right. This results in Musical Ear Syndrome.