Posted by Barry Guerrero on October 10, 2001 at 12:49:03:
In Reply to: Mouthpiece Woes posted by Larry Zaidan on October 10, 2001 at 10:17:42:
That's usually caused by a mouthpiece being so big, that the octaves begin to shrink - at least in my experience. Big m.p.'s sound wonderful, but you also run the risk of the octaves becoming smaller, which helps to throw everything else out-of-whack. If this is the case, you may have to compromise in some way (width; depth; bore size; or drill open the tail end of the back bore). This is one reason why m.p.'s tend to run in either the wide/shallow variety (C4), or the narrow/deep variety (Hellebergs of various types). Either that, or you may want to examine how your m.p. fits the horn. Sometimes, you can make some improvement my making certain that the end of the shank is butting up fairly close to the end of the leadpipe - not leaving too big of a gap.
Also, keep in mind that ANY m.p. change is going to alter intonation to at least some small degree. You have to learn those quirks all over again.
good luck,
Barry Guerrero