The medical name for the condition often called tone deafness by the general public. A search using the word amusia yields interesting results among them the idea that amusia is often associated with right hemisphere brain damage. The centres of brain activity relating to music are now discernable using pet scans and the brain processes 6 different facets of musical information the primary one being pitch. Now if you use tone deafness as a search word you'll get scads of people complaining that they were labled as such by music teachers and it forever affected there ability to sing. BTW there is also a condition called vocal motor amusia and it relates to an inability to sing on pitch. Tone deafness as a medical condition is a currently accepted concept in the brain research community and seems proveable using accetepted scientific methods and research. Read it yourself I ain't making it up nor do I think it's all that common. My heartfelt sympathies to anyone on this list labled tone deaf as a child, it's a terrible stigma and one that was applied to me as well. fjm