Concerto No. 3 in E-flat Major, K. 447, was originally written for natural horn and the performer Joseph Leutgeb (1732-1811).  Unlike the other two Mozart concerti, Concerto No. 3 does not contain any runs or arpeggios to a high B^b, thus making it more accessible to a younger player.  While it is a standard work in the horn repertoire, it is not commonly asked on orchestral auditions or competitions.  The difficulty in this piece lies in the nuance of performing in the classical style.  Additional technical difficulties include lip trills and some fast sixteenth-note runs..