Descending Shepard tone》Auditory illusion.

Shepard tones are auditory illusions, they can be uncomfortable for few individuals like feeling dizzy or nausea, and relaxation for few.

So here how it works, let's say we got 3 tones separated by 1 octave each, upper tone pitch get quiter, middle tone pitch remains loud, and the base tone pitch becomes audible, now play all three together and loop it up, there you go, an never ending illusion of increasing decreasing pitch. Loop it all together, with a continuous transition between tones.
Since you can hear at least 2 tones raising in pitch at the same time, your brain gets tricked to be listening a constant increasing / decreasing tone infinty, yet in reality it never gets any higher or lower.

We made it with 10 different pitching frequencies, 5 up pitching tones and 5 low pitching tones, Heigher ones give negative infinty dbFS, Lower ones give 0dbFS.

HOPE YOU ENJOY IT !!