To play the horn in tune, it's essential to have a great embouchure. This refers to the muscles of the face and lips that surround and support the buzz. The best way to learn the horn embouchure is by practicing in front of a mirror.

To achieve this, follow these steps:

1) Pretend to be a Parisian who smells something unpleasant and say "Peuh!"​ Next, say "mmm" and while holding that facial expression, say "peuh" again. Keep your chin flat.

2) Place the mouthpiece onto your lips while maintaining the same expression. The mouthpiece should rest 2/3 on the upper lip and 1/3 on the bottom lip. To ensure you get the ratio right, imagine that the mouthpiece is a glass of your favorite drink, and tilt it upwards as if you're drinking from it. The pressure from the mouthpiece should be equal or greater on the lower lip.

3) Look in the mirror and check for a red area on the bottom lip below the mouthpiece, a diamond-shaped line around the lips, and a flat chin.