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Schilke knows the importance of possessing the best mouthpiece for the instrument and the player. The Schilke Mouthpiece Numbering Systems are designed to aid students, amateurs, and professionals alike in determining the best mouthpiece for their style, comfort, and performance needs. Initially important is the fit of the mouthpiece. It is necessary for the shank of each brass mouthpiece to touch the end of the mouthpiece once inside the instrument. This creates an even taper from the backbore of the mouthpiece to the inside. Keeping a mouthpiece clean with a mouthpiece brush is incredibly important as dirt can greatly affect intonation. The numbering system for trumpets is divided into four components delineating cup diameter, cup volume, rim contour, and backbore. The cup diameter is the first upper-case number in the system. Most cap diameters of trumpets and cornets fall between .600” and .725.” The number 1-25 in the Schilke system represent .005” increments between .600” and .725.” The cup volume is indicated by the upper-case letter. Mouthpieces with a deeper cup create the darkest sounds while shallower cups generate bright sounds and are intended for playing in high registers. Within this numbering system A is small, B is medium-small, C is standard (medium), D is medium-large, and E is large. The rim contour is the second number in the system. 1 stands for rounded, 2 for semi-rounded, 3 is standard, 4 is semi-flat, and 5 is only slightly rounded. Most players prefer the #3 rim contour as it is flat enough to create an ideal air seal but its slight rounding allows for some flexibility of play. Rounder rims offer even more flexibility but can be tiring to play. Flat rims feel comfortable to the player but more or less hold the lips in a fixed position. The final small letter in the numbering system indicates the backbore. Tighter backbores are ideal for creating bright, brilliant sounds while larger backbores lend themselves to more mellow sounds. Among the backbore delineations, a represents tight, b is straight, c is standard, d is slightly curved out, and e is large. Using this method, a standard mouthpiece might be represented as 9C3c. However, when all of the measurements are standard, this mouthpiece would likely be represented only with a #9. Regardless of your level of play, use the Schilke Mouthpiece Numbering System to determine the best mouthpiece for your preferences and needs.