 Shepard Tones downpitch, spectrum, linear scaled Image by Grin, via Wikimedia Commons. Licensed CC BY-SA 4.0 |
The RoyaltonesShepard tone Shepard tone Auditory illusion A Shepard tone, named after Roger Shepard, is a sound consisting of a superposition of sine waves separated by octaves. When played with the bass pitch of the tone moving upward or downward, it is referred to as the Shepard scale. This creates the auditory illusion of a tone that seems to continually ascend or descend in pitch, yet which ultimately gets no higher or lower.[1] A spectrogram of ascending Shepard tones on a linear frequency scale Construction Figure 1: Shepard tones forming a Shepard scale, illustrated in a sequencer Each square in Figure 1 indicates a tone, with any set of squares in vertical alignment together making one Shepard tone. The color of… (Source: Wikipedia)
|
