My wife and I greatly enjoyed the early French-Handel-Telemann concert last night. We were intrigued by the two-foot-long trumpets and the extra curly horns. I opined that maybe the extra pipe functioned much as today's brass mutes do, softening the sound and helping it to combine with other instruments. (But I'm willing to be proven wrong.) Your explication, please?
Ensembles like Philharmonia Baroque, which play early music on period instruments (i.e. instruments like the ones used in the period in question, the 17th and 18th centuries in our case), use trumpets and horns without valves. For these "natural" instruments, the length of the instrument (that is, the length of brass tubing) determines the fundamental pitch of the instrument and, by adjusting the tension of the lips, the player can produce the notes in the harmonic overtone series of that fundamental pitch.In the 19th century, instrument makers started experimenting with keys and valves which would allow the player to have an instrument that was the maximum length he would ever need, but would allow him to artificially shorten the length of tubing by diverting the airflow by means of opening or closing valves. Bernard D. Sherman writes in the recent article in Early Music America Magazine:
Inventors first applied valves to the horn in 1814, yet the results still sounded “intolerable” in the 1820s to the foremost composer for the instrument, Carl Maria von Weber. In the 1830s, when Brahms was born, a Viennese inventor patented an essentially modern valve, and the Parisian composer Jacques Halévy published the first orchestral parts conceived purely for valved horns. They were to be played alongside the old and tellingly named natural horns. Such hybrid scoring continued in the 1840s, with examples from Robert Schumann and Richard Wagner.





















