The only music that is not frowned upon is the Kingdom Melodies. Any other music is considered worldly.
A Study article in JW literature," Are we being entertained by what Jehovah hates?" was a current theme among witness teaching, descrbing how we were to be wary of all forms of entertainment from movies to music and covered a wide spectrum of music catagories. Even classical music, which was thought to be safe at one time, when taking into consideration the debauched life of those who performed such was not to be taken for granted as being wholesome or upbuilding.
In hindsight, however, I don't know how any of us could've viewed any type of entertainment as worthy of JW standards as Jehovah hates anyone or anything, not of his people or his earthly organization, leaving very little room for we as witnesses to be entertained by. Country, Classical, Classic Rock, Hip Hop, R&B, Pop & Soft Rock, Soul, Techno, Gospel, Disco, Indie,.......did I leave anybody out?