Shepard Tones are an audio illusion that create the perception of a continuously ascending or descending tone.
1 through 32 Second Seamless Loops. Ascending and Descending versions for a total of 64 Samples. Mono 24 Bit/48 kHz.10 octave sine wave sweep E0 through E10. Loop these samples and they will seemingly continue forever!
These royalty free looping samples are intended for sound designers and composers to blend into their creations. On their own, sine waves aren't very exciting, so the point is to use these seamless loops as tools. For the example here I used the 32 second Descending Loop, and added distortion and reverb. I duplicated the loop twice (which is why it's 1 minute and 36 seconds long) so that the audio illusion can be perceived.
The Shepard makes his tones to confuse and disorient would be sheep thieves. The Shepard graciously allowed Racket Jack to record these mystical endless loops, in exchange for helping find one of his lost sheep, and create this sample library.