SampledSoundFunction[f, n, r] is a sound primitive, which represents a sound whose amplitude sampled r times a second is generated by applying the function f to successive integers from 1 to n.
SampledSoundFunction[, , ... , n, r] yields sound on several channels.
SampledSoundFunction is generated by Play.
SampledSoundFunction primitives can appear inside Sound, Graphics and Graphics3D objects.
See The Mathematica Book: Section 2.9.18.