What is another word for bass tuba?
Pronunciation: [bˈe͡ɪs tjˈuːbə] (IPA) 
The bass tuba is a large brass instrument often used in orchestras and marching bands for its distinctive low-pitched sound. However, there are several synonyms for this instrument, including the sousaphone, euphonium, and helicon. The sousaphone is an especially recognizable instrument due to its large bell and shape, which wraps around the player's body, making it popular in marching bands. The euphonium, on the other hand, is smaller than the bass tuba and produces a milder tone. The helicon is similar to the sousaphone in shape but with a straighter bell and smaller size. Each instrument has its own unique sound and purpose, but all provide the deep notes that are a staple of brass music.
