How to play brass instruments? French horn, trumpet, alto and so on.

Also, practice the mouth shape first, the mouth is smiling, the lower lip is slightly retracted, then exhale evenly (breath downward), and then slowly shut up and vibrate, so that you can blow out the sound, the bass is slow and the treble is short.

There are only four keys pressed by the horn, and the length of the pipe through which the gas passes is also adjusted by the keys to match your high and low notes, but the key is to adjust it by your own breath.

Actually, you are in a band. You can just ask them about brass and try it ~ ~