Musicology traditionally is divided in three main branches&colon; historical musicology, systematic musicology and ethnomusicology. The PhD is the standard doctorate in music theory, musicology, music therapy, and ethnomusicology. Ethnomusicology, formerly comparative musicology, is the study of music in its cultural context. Since ethnomusicology evolved from comparative musicology, some ethnomusicologists' research features analytical comparison. Music archaeologists use methods of both musicology and archaeology. He then earned a PhD in musicology and art history at Vienna University. Music psychology can shed light on non-psychological aspects of musicology and musical practice. History, Geography, Languages, Musicology, Philosophy are part of this faculty. Eventually, comparative musicology began experiencing changes. Together with Otto Abraham, they founded the "Berlin School of Comparative Musicology". He has made contributions to the field of Carnatic musicology. He graduated with a degree in Musicology in 1971 from the university's Steinhardt School. A controversy in the field of musicology arose surrounding "Negro Spirituals". A number of institutions of higher education offer degrees in music and musicology. There are also national differences in various definitions of historical musicology.