What is an upper brass instrument?

An upper brass instrument is a musical instrument that produces sound by the vibration of the player's lips against a metal mouthpiece. The lip vibration creates a standing wave in the instrument's tubing, which is amplified and shaped by the instrument's bell. The sound of an upper brass instrument is typically bright and piercing, and it can be used to produce a wide range of pitches.

Some common upper brass instruments include:

- Trumpet