For the music interests, Univ of North Texas would be great. A renowned jazz studies program attracts strong musicians from around the country, and this tends to spill over into a strong local music scene in Denton. There are a couple of UNT music families who frequent these forums and could provide more specific info.
As far as “great campus spirit with traditions,” that’s in the eye of the beholder, I guess. UNT was traditionally more of a commuter campus, but it’s now trying to build a more residential culture. If OP is looking for a true rah-rah atmosphere with sports teams etc., there are other places that would be better choices, but UNT jazz is second-to-none.