[JPL] Valve trombones and slide trumpets

Lazaro Vega wblv.wblu.fm at gmail.com
Thu Dec 22 09:49:28 EST 2011

A conical bore is one that continually expands from the mouthpiece to
the bell of the horn -- a cornet and flugelhorn have that design --
where as a trumpet is the same until it gets to the bell and then

Just saw of picture of Freddie Keppard holding a slide trumpet.


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