elephant_pyro
Now i'm lost what are the C??????
Ok heres a lesson on mouthpieces...if you dont already know....
A - Cup Diameter
This is the single most commonly measured characteristic of a mouthpiece. In general, a large diameter cup allows a very full sound, especially in the lower registers; a smaller diameter cup may make higher notes easier to play while sacrificing tone quality. Young players are often steered towards mouthpieces with small cups because they produce a sound easier. However, beginners that start on larger mouthpieces tend to develop more strength in their embouchure - a definite plus down the road!
B - Cup Depth and Shape
The depth of the cup goes hand in hand with its diameter - a deep cup produces a large, dark sound, while a shallow cup makes it easier to play in the high register. The exact shape of the cup can also have a dramatic effect on the sound and feel of the mouthpiece - some custom mouthpiece designs have a nearly 'V' shaped cup which allows a tremendous volume of air without losing focus.
C - Rim Width and Shape
The cut of the rim affects the player's flexibility and endurance. A narrow, sharp rim will allow quick note changes and clear attacks, but may cause the musician to tire very quickly. A wide, rounded rim will help endurance, but clarity and flexibility will suffer.
D - Backbore
The backbore of a mouthpiece controls both the resistance and tone of a mouthpiece. A tight, narrow backbore will produce a brilliant, cutting sound with a large amount of resistance; a large, open backbore will be more mellow and free-blowing. In some circumstances, the backbore can alter the entire instrument's intonation - a possible fix for a problem horn.
These, of course, are just general ideas of what the different parts of a mouthpiece do. There is NO substitution for actually playing the different sizes and options available - there is no universally perfect mouthpiece!