What are the main differences between brass and wind instruments in terms of their construction, sound production, and playing techniques?

Brass instruments are made of metal and have a mouthpiece that players buzz their lips into to produce sound. Wind instruments are typically made of wood or metal and have a reed or mouthpiece that players blow air through to produce sound. Brass instruments have a bright and bold sound, while wind instruments have a softer and more mellow sound. Playing techniques for brass instruments involve using the lips and breath control, while wind instruments require precise fingerings and breath control.