Tom Crown mutes are one of our most popular straight mutes. The straight mute is a device inserted into the bell of a trumpet to either make the tone produced softer, to change the tone quality, and with the Baroque trumpet, to change the tonality.
Straight mutes will generally fit any Bb or C trumpet bell. The mute should be playable to the low F-sharp. If the low register does not respond, the corks should be sanded down gradually until the low F-sharp responds. Because the B-flat trumpet can play a whole tone lower than the C trumpet. corks on a B-flat trumpet mute have to be a little lower, allowing the mute to go farther into the bell.