- Lowest note: B♭1 (concert pitch)
- Highest note: F4 (concert pitch)
The euphonium is a member of the brass family of musical instruments. It is a low-pitched brass instrument that is similar in appearance to the trombone, but with a wider bore and a larger bell. The euphonium is a versatile instrument that is used in a variety of musical genres, including classical, jazz, and brass band music.