Alfred J. Hipkins, Musical Instruments, Historic, Rare and Unique
“ The bending back of the trumpet upon itself, now a well-known feature in the appearance of the instrument, was an invention of a Frenchman towards the end of the fifteenth century. The trumpet is one of the oldest wind instruments used in concert with others. As far back as 1607 a piece for five trumpets, in the Orfeo of Monteverde, was played at the Court of Mantua. It became an instrument much cultivated, and Handel's and Bach's parts for it are of extreme difficulty. The notes of the trumpet are the natural harmonics produced by varying pressure of the lips in the mouthpiece. ”
