Silent Night with Overtone Singing

“Silent Night, Holy Night”, the world’s most famous Christmas song, was sung for the first time on 24.12.1818, exactly 200 years ago. On Christmas Eve 1818 the Arnsdorf village school teacher and organist Franz Xaver Gruber (1787-1863) and the auxiliary priest Joseph Mohr (1792-1848) performed the Christmas carol for the first time in the Schifferkirche St. Nikola in Oberndorf near Salzburg, Austria. (Wikipedia)

For this version for overtone singing, the brilliant pianist Michael Reimann has improvised a piano movement on the electric piano. The notes for overtone singing are suitable for beginners. At one point, however, a small psychoacoustic trick is used, because one of the melody notes is not actually included in the overtone series. Who can find it?

Michael Reimann: https://www.michaelreimann.de/
Video: Ljubljana Christmas Market filmed from the castle.