To most players, the depth that the trumpet mouthpiece extends into the mouthpiece receiver means nothing. To some, it is imperative that the distance be calculated and established. To some, the controversy has never come up. We will try to first explain what is meant by the gap, then how it affects the trumpets playing characteristics and finally show how you can make the necessary adjustment in order to possibly change your instruments playing characteristics. What is meant by the term gap? The term gap refers to the distance from the end of the trumpet mouthpiece to the beginning of…