After a brief introduction by the mc, a charming Swiss teenager plays the Alpenhorn in this YouTube video. The horn is clearly much longer than she is tall.

swiss cutie

I've tried to see evidence that she is making the notes in her mouth, but except for the well-known fact that high eyebrows help high notes, no luck.

It is nice to see that they have repealed the law that you have to wear Lederhosen and a felt hat with a feather in it when you play Alpenhorn.