This case report is about a 15-year-old male trumpet player. The boy's teacher noticed that he contorted his face when playing high notes and thought that this could be due to his protruded upper front teeth; therefore, the teacher advised him to consult an orthodontist. The orthodontist diagnosed an Angle Class II Division 1 malocclusion with a disto-occlusion of 1/4 premolar width, enlarged overjet, palatal bite, spacing of the upper front teeth, and mild crowding of the lower front teeth. The young trumpet player was orthodontically treated with aligners. During the treatment, he did not experience any discomfort or interference with his embouchure. He experienced a marked improvement in his trumpet performance, particularly after his enlarged overjet was corrected. This treatment approach is promising for other brass players, although not all malocclusions can be easily treated with aligners.