Posted by Scott Whitener on April 02, 2003 at 09:51:10:
In Reply to: "tromboning" posted by Mike Mason on March 30, 2003 at 13:23:26:
Alla Scott Whitener, author of: "A Complete Guide to Brass"
"For more advanced players, it is preferable to adjust the intonation of a note mechanically (i.e. moving a valve-slide) rather than with the lip because of the negative effect on tone and stability caused by forcing an off-center note into tune with the embouchure."