The motion picture has ever been seeking, in its spare moments, the third dimension, and the efforts of sound technologists to achieve the effect of variable distance and direction, plus a realistic volume, were inevitably to bring the phrase "third-dimensional sound." The term is apt to be confusing, and we get no clarification of it from Walt Disney's "Fantasia." The characteristics of the sound of "Fantasia" which distinguish it from that produced by regular methods are, with one exception, to be identified with those possessed by regular sound of today's highest standards, but they represent greater refinement of processes. The exception is the flexibility, the directional effects procurable, through the complex transmission system involving speaker networks in various parts of the auditorium as well as three horn systems behind the screen. […]
