Brass and woodwind instruments are two main categories of musical instruments in the orchestra. Brass instruments, such as the trumpet and trombone, are made of metal and produce sound through the vibration of the player's lips in a mouthpiece. They are known for their bright, powerful tones. Woodwind instruments, like the flute and clarinet, are typically made of wood or metal and create sound by splitting air on a reed or through an opening. These instruments often have a softer, more mellow sound compared to brass. Both families play essential roles in orchestral and band music.