After reading up on it and listening to the Dream Weaver sample, I think it's safe to simply call bullsh!t on Holographic sound.
"Zuccarelli states that the human auditory system is a sound emitter, producing a reference sound that combines with incoming sound to form an interference pattern inside the ear. "
Even if that were true, and I doubt it is, it fails to explain how an interference pattern might aid in localization, or why it would be needed. Curiously, the inventor has filed a
patent but has never actually described his method publicly. The patent simply describes using a dummy head between two microphones.
Here's a guy showing
how to build a holophonic microphone, which consists of two mikes stuffed into a mannequin head. Otherwise known as binaural recording, but that's been around forever so he had to invent "holographic sound" to convince some clueless patent examiner that the idea was new and novel.
In any case, the sample I listened to sounded just awful on both headphones and speakers. Even if there is anything to the theory, if that's an example of what to expect then I'm not interested. (Actually, I suspect it was just a very bad recording.)