Rauhigkeit 1 Apser = Sinus 1000 Hz und Sinus 1070 Hz gleichzeitig.The sound of a harshness of 1 asper = a sine wave tone of 1000 Hz 100 % modulated with a sine wave tone of 70 Hz at 60 dB sound pressure.
Sum and difference tones of A220 and unison, just perfect fifth, and octave. Note that this is not produced through ring modulation of two notes, but is four separate notes.
An ascending fifths sequence in C major. Notice the "circle of fifths" pattern in the lower staff similar to the descending fifths sequence, except going in the opposite direction.