Posted by engineer 2 on February 01, 2001 at 21:25:23:
In Reply to: Now this is strange posted by Mark F. on January 31, 2001 at 22:00:53:
Try wrapping a (non-scratching) belt, or some other "damping" material around your 4th valve tubing in order to add some vibrational damping (and some mass) to the instrument in that area. Do this without your 4th valve extension installed. If you achieve a similar result, then I'd go along with "engineer" that you've changed the vibration "capability" of the instrument by adding the extra mass or some vibrational damping due to the slide extension.
Sam Gnagey reports significant improvements in the projection of his 5/4 Rudy Meinl CC by wrapping a leather belt around his bell somewhere near the middle of the flare (top to bottom-wise), and thereby preventing or changing the bell's natural vibrational profile.
I wonder if I could play higher if I installed suspenders on my horn . . . .