Music therapy is an interdisciplinary subject of musicology and therapy. Musicology is a major and is divided into two categories: systematic musicology and historical musicology. Musicology graduate students can be divided into theoretical and applied types. Kindly, music therapy is a newly developed sub-discipline in the past twenty years and belongs to the latter. There is no problem in applying for the exam, and it belongs to this major. Even if you are applying for musicology (history theory direction), it is still possible. It is very important to look at your subject background and subject structure when applying.