Wedding March
From Memory Alpha, the free Star Trek reference
The Wedding March is a piece of classical music written by Earth composer Felix Mendelssohn Bartholdy for his adaptation of William Shakespeare's A Midsummer Night's Dream.
When the biomemetic doubles of Tom Paris and B'Elanna Torres were married in 2375, Harry Kim played the tune on his clarinet, accompanied by two USS Voyager crew members playing the double bass and the guitar after the wedding ceremony. (VOY: "Course: Oblivion")
