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Modern versus baroque
"Modern instruments have what are called vent holes. These are located at an anti-node, or a position where the sound wave reflects off of the inside of the tube."
I believe the finger holes on modern reproductions are actually located at nodes--more specifically, they create a new node. In the case of my Meinl & Lauber trumpet made in 1970 ("Modell Tarr"), the single hole, usually played by the right thumb, raises the pitch of the instrument up a fourth, allowing the 11th and 13th harmonics to be played as the 8th and 10th in the new harmonic series.
It's important to note that there are museum originals with holes (allegedly discovered in the early years of the 20th C.--I'm not sure if it was Curt Sachs or Otto Steinkopf), but these holes are supposedly placed at anti-nodes, and thus suppress certain notes, rather than bringing them in tune.
Mention should be made of the practice of "heruntertreiben", or "driving notes down", which, according to Edward Tarr, was part of every capable trumpeter's technique, and is quite possibly the one essential ingredient missing from today's attempts at re-creating the art of baroque trumpet-playing.
Cbrodersen 17:48, 17 January 2007 (UTC)