First warning! Modifying a mouthpiece could ruin it. With that note of assurance, let’s see what can be done to a mouthpiece to change its playing characteristics. Parts of a trumpet/cornet/flugelhorn mouthpiece- Rim- contoured section which comes in contact with the players lips Bite- Inner edge of rim Cup- Largest section of mouthpiece Second cup- First area of increased air resistance Throat- Most narrow path of the air stream Back bore- Gradual tapering outward from the mouthpiece into the instrument Shank- Area inserted into mouthpiece receiver Rim alterations- none can be done without permanent damage to the mouthpiece Shoulder- none…