Now to make our first sound. Look at the lip plate around the hole in the headjoint. The wider side is for your lower lip. Starting from a good playing posture, tuck the lower, wider half of the lip plate into the recess under your lower lip. You should barely feel the hole in the plate touch your lip. Now roll the headjoint up a little. Your lower lip should slightly cover the lower edge of the mouthpiece hole. Make sure the headjoint is at a right angle, not slanting upwards or downwards. Playing in front of a mirror will help a lot here.