[TPIN] Bore sizes......

[Richard Mason]

There are three other major variables that affect the  blow of a horn.  They are the mouthpiece, the lead pipe, and the alignment of the valves.  As a result of this combination the answer to your question is "maybe".  However, you can definitely feel the difference in blow between horns.

For example, the Connstellation trumpet from Conn (#38B) plays like an ML horn, although it is a small bore of .438 (Conn #1 bore).  The open lead pipe however makes it feel about the same size as my King Super 20 which is .448 and Yamaha 6310Z which is .450.

I have a Callet New York that is .470 bore, but the conical leadpipe makes it feel smaller than my Schilke X3 which is .463.  

The Conn Victor cornets were mostly available in their #2 1/2 bore (.485).  That's approaching the size of a trombone, but these horns play like a large bore cornet, not the extra large bore that you would expect.

Trying to find a good balance to the blow of a horn is one of the reasons you see people reaming out the throat of their mouthpiece, or playing a wider rim than someone else.

If you try to over blow a horn it will feel stuffy because of the extra back pressure.  For instance, the Yamaha Z horns like the 6310Z are .450 bore.  If you pushed them they were quite stuffy, but if you back off and let the horn do its magic they were very fine horns, as demonstrated by the number of marvelous players that played them.

The extreme is to play the older french flugels which were often .410-.420.  If you play them like a trumpet they are very stuffy and don't sound too good, but if you just breath into them you can almost sound like Clark Terry, at least for a note or two.

Most of us play too loud and are quite proud of it.  

Richard Mason
Denver, CO

Olaf Brattegaard <olaf.brattegaard at nrk.no> wrote: The difference between .459"/.460"(ML) and .462"(L) is .002"/.003", i.e.
2-3 thousands of an inch.
Can it be perceived, can it be verified, or is it yet another
imagination?

Olaf in Oslo 

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