| I was talking with my chemistry teacher, and she explained a little of what happens when you cryo freeze an instrument...
She said that all metals have small imperfections in the layering and stacking of the atoms. When frozen, the movement of the atoms decreases, allowing these bumps and grooves in the atom layering to settle in. Now the atoms in the horn are more properly aligned and such resulting in better harmonics, maybe.....
Jared |