- Country: USA
- Genres: Animation, Short
- Release: 1957-11-15
- Director: Seymour Kneitel
- Writers: Carl Meyer
- Language: English | German
- Stars: Jack Mercer , Jack Mercer , Cecil Roy , Cecil Roy
- Runtime: 7 min
- Awards: N/A
- AKA: Det musikalske spøgelse (Denmark) , Boo Bop (United States of America) , Boo Bop
- Plot: Casper tries to help the ghost of composer Franz Schubert complete his "Unfinished Symphony."
- IMDB:tt0147909
Boo Bop Cast
Seymour Kneitel
Director
Jack Mercer
Franz Schubert's Ghost
Jack Mercer
Franz Schubert's Ghost
Cecil Roy
Casper
Cecil Roy
Casper