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The Wagner tuba is a narrow-bore tuba with a French-horn mouthpiece. Tubas appeared first in Berlin in the 1820s, soon after the invention of the valve. They were soon accepted into the band and orchestra, displacing the serpent, ophicleide, and other such instruments of poorer tone quality and intonation.
The invention of the multi-key piccolo is attributed to the flute teacher from Prague, Michael Janusch, who developed the instrument in 1824. This instrument was equivalent to the flute with six keys customary at the time.