Princeton University  

BACCH™ 3D Sound


A Revolutionary Technology for Audiophile-Grade 3D Audio


An Introduction through 20 Questions and Answers


BACCH™ 3D Sound (also previously called "Pure Stereo 3D Audio™" or "Pure Stereo") is a recent breakthrough in audio technology (licensed by Princeton University) that yields unprecedented spatial realism in loudspeaker-based audio playback allowing the listener to hear, through only two loudspeakers, a truly 3D reproduction of a recorded soundfield with uncanny accuracy and detail, and with a level of high tonal and spatial fidelity that is simply unapproachable by even the most expensive and advanced existing high-end audio systems. This poster summarizes the fundamental principles behind this technology as well as some technical aspects of its implementation. Learn more about BACCH™ 3D Sound through the following 20 Questions and Answers:

(A PDF version of these 20 Q&A can be downloaded from here.)

  1. What is BACCH™ 3D Sound?
  2. How does BACCH™ 3D Sound differ from surround sound?
  3. Does BACCH™ 3D Sound meet the highest audiophile standards?
  4. How can I add BACCH™ 3D Sound to my Hi-Fi system?
  5. Does BACCH™ 3D Sound require special loudspeakers?
  6. Does BACCH™ 3D Sound require special room treatment?
  7. Does BACCH™ 3D Sound require sitting in a sweet spot?
  8. Does BACCH™ 3D Sound require special positioning of the loudspeakers?
  9. What does BACCH™ 3D Sound require from a Hi-Fi system?
  10. How does BACCH™ 3D Sound work?
  11. What are customized and universal BACCH™ Filters?
  12. Is BACCH™ 3D Sound compatible with existing stereo recordings?
  13. Is the 3D realism of BACCH™ 3D Sound the same with all types of stereo recordings?
  14. Is BACCH™ 3D Sound compatible with analog audio?
  15. Why is BACCH™ 3D Sound sometimes called this "Pure Stereo"?
  16. I have heard of binaural audio and crosstalk cancellation. Are they related to BACCH™ 3D Sound?
  17. How does BACCH™ 3D Sound differ from Ambiophonics?
  18. How does BACCH™ 3D Sound differ from other 3D audio techniques?
  19. How does BACCH™ 3D Sound correct problems in audio playback?
  20. Can BACCH™ 3D Sound be experienced without the the BACCH-SP Processor?