When I was in grad school back in the '70s, Tarr gave a lecture
demonstration on the Bq. trumpet. He was at that time developing
non-vented replicas of historical trumpets, *using historical
construction methods*. He explained that early trumpeters did not need
the vents, because the trumpets they used were hammered out on a form,
and were thus slightly imperfect in their internal contours; this
irregularity provided the player with just enough wiggle room to play
all notes securely without the vents that, ironically, a
mathematically perfect valveless trumpet requires.
Andrew Stiller
Kallisti Music Press
http://www.kallistimusic.com/
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