The horn concertos by Wolfgang Amadeus Mozart have always been part of the standard repertoire of every horn player. Tyrolean hornist Hansjörg Angerer presents the four horn concertos with the Ensemble Salzburger Hofmusik under the direction of Wolfgang Brunner on an original instrument by an unknown Bohemian master from around 1800. The natural horn originated from the hunting horn by combining the windings, whereby the natural tone series could be played in all common keys by placing different tuning crooks on it and, in addition, the intermediate tones of the natural tone series could be obtained, and the sharp or flat tones could be regulated by inserting the right hand into the falls by “plugging” and “damping”. The complex playing techniques as well as the characteristic sound differ fundamentally from a modern valve instrument and allow a deep dive into the great variety of colours in the music of this era.