Alpine horn

The longest alphorn is said to be 45 m long. The woodwind instrument is mainly used as a musical instrument in Switzerland and Austria. The length of the alphorn determines the tone . The longest playable alphorn can play up to 64 notes, although there are no keys. Some alphorn players can play jazzy alphorn compositions. You can find more information here:https://www.sac-cas.ch/de/die-alpen/das-alphorn-4072/