The helicon is derived from the saxhorn, or the saxtuba. The saxtuba is often mistaken for one of the larger members of Sax's saxhorn family. He also invented the saxotromba, saxhorn and saxtuba. He visited the shop of Adolphe Sax, the inventor of the saxophone and saxhorn. The instrument is often confused with the closely related saxhorn. He plays a bass saxhorn in The Salvation Army band. Like the saxhorn, the saxtuba was a transposing instrument. Like the saxhorn, the saxotromba was a transposing instrument. The term "saxtuba" may also refer to the bass saxhorn. His son was Adolphe Sax who invented the saxophone, the saxhorn and the saxotromba. In his "Treatise on Instrumentation" Berlioz described nine different sizes of saxhorn. The saxhorn also laid the groundwork for the modern euphonium. The saxhorn was the most common brass instrument in American Civil War bands. Together with two other citizens of Staunton, they formed the Mountain Saxhorn Band. These two and other white, male citizens of the city formed the Mountain Saxhorn Band.