The bass tuba is a large brass instrument known for its deep, rich sound. It typically has a wide bell and is played using a mouthpiece, producing low pitches that are essential in orchestras and concert bands. The bass tuba is often used to provide harmonic support and depth in musical compositions. This instrument is part of the tuba family and is usually pitched in BB♭, making it one of the lowest instruments in the brass section. It is commonly featured in classical music, military bands, and even jazz ensembles, showcasing its versatility across various musical genres.