Mozart Table Music

Written for a pair of violins, Mozart's piece Der Spiegel (The Mirror) duet for violins features a very particular type of arrangement. The lead part is read from top to bottom just as you would a normal piece, but the supporting part is read from bottom to top while the page is upside-down. For this reason alone the piece is more commonly known as the Mozart Table Music, where both violinist stand on opposite sides of a table and play the piece.
Lead part displayed as the normal piece
Lead part displayed as the normal piece

Supporting part displayed as the piece upside-down

Physics Aspect

Pythagoras founded the tone systems theory also known as temperament problem. The temperament is a scheme of musical tuning in which the octave is divided into a finite series of steps. Pythagoras stated that the relations between each tone are defined as the ratios between elements of the finite set of integers T = (1; 2; 3; 4; 8; 9; 16; 27; 64; 81; 128; 243). Until the twelve-tone equal temperament (which is nowadays used in most Western music and it is the best known example of such a system), all the following tone systems referred to Pythagoras’ works.

Art and physics in one? I concur.