true 3d sound [ holoacoustic ] demonstration

use headphones or earphones for real experience holoacoustic is a 3d sound technology of the future to listen holoacoustic (also holophonics) with ordinary stereo speakers 1. set the speakers on wide range more than scale of human head 2. no effects on hardware and software 3. solve [ range(left speaker to left ear) = range(right speaker to right ear) ] --- holophonics, holography