It may do you good, but don't press too long, he could stop breathing. An ASR-10 instrument. Sampled among others from p600 and SD-1 and using Transwaves. All samples are computer generated by SMP a long time ago. Most instruments have 4 different versions by using the patch select buttons.
Shepard tones are classic auditory demonstrations in electronic music and in perception of pitch.
They are often used to create the auditory equivalent of the illusions shown below. The timber of Shepardtones is constructed, in the present case, in such a way that the notes are equivalent when their pitch is one octave apart. We will most likely not imidiately discover that we are back to the starting point after one octave. In the image here there is an instrument suitable for experimenting with ascending or descending notes a halfstep apart. It is important for the illusion that we play evenly and fluently.