The waltz was a type of classical Earth music that originated in the 18th century. The dance for this music type was also called "the waltz". (TOS novel: The Rift)

In 2366, the Douwd who took the human identity of Kevin Uxbridge on the planet Delta Rana IV used waltz music from a music-box to distract the empathic powers of USS Enterprise counselor Deanna Troi. (TNG episode: "The Survivors")