Ever wonder what Category 3 Music means: here is description supplied by the NCRA.

Category 3 - Special Interest Music
This encompasses musical selections in the genres or groups of genres set out below:

Subcategory 31: Concert
Concert music includes the whole spectrum of the “classical” music traditions, including opera and operetta. It also includes extended dramatic excerpts of popular musical theatre when performed in a full-cast version. It does not include orchestrations of “popular music”, however classical in form.

Subcategory 32: Folk and folk-oriented
This genre includes authentic, traditional folk music, as well as contemporary folk-oriented music, that draw substantially on traditional folk music in style and performance. It includes old-time country music recorded before the 1950s, and traditional bluegrass.

Subcategory 33: World beat and international
This genre includes world beat music that draws heavily from the traditional music styles of countries throughout the world. It also includes music from the popular, folk and classical music traditions of countries throughout the world that are played in instrumental form or sung in languages other than English and French.

Subcategory 34: Jazz and blues
This includes both historic and contemporary music in the jazz and blues traditions. Examples of music in the jazz tradition include ragtime, Dixieland, “golden age” swing, modern swing, bebop, “cool” jazz, modern, avant-garde, Latin-oriented jazz, jazz-funk, soft contemporary jazz, contemporary jazz fusion and other contemporary and emerging jazz styles. Examples of music in the blues tradition include classic blues, delta blues, Chicago blues, and contemporary blues music.

Subcategory 35: Non-classic religious
This refers to music of religious faiths. It also includes gospel music, hymns, and contemporary Christian music.