Princeton University  

3 Does BACCH™ 3D Sound meet the highest audiophile standards?

BACCH™ 3D Sound does not add anything to the sound. It simply subtracts an artifice that exists during playback through loudspeakers. This artifice, called crosstalk (see Q&A 10 ), corrupts the natural transmission to the brain of of the 3D cues that exist in all stereo recordings. The main breakthrough that led to BACCH™ 3D Sound was the development of a mathematical algorithm that allows, for the first time, this removal of artifice to be done, in the case of two loudspeakers, without adding artificial coloration to the sound.

BACCH™ 3D Sound was developed by a scientist-audiophile and recordist of classical music, whose prime concerns are the realism and fidelity of recorded music. Consequently, the digital processor and the software used to apply the BACCH™ 3D Sound filter (called BACCH™ filter) to an input stereo signal yield pristine audio. The audio performance exceeds the most stringent audio standards. The processor operates at the high-resolution frequency of 96 kHz and carries out all needed digital processing calculations at full 64 bits (followed by D/A conversion at 24 bits) in order to avoid degradation to the sound quality and dynamic range5. This far exceeds the quality of CD recordings (44.1 kHz, 16 bits) and equals the purity of audio in professional master processing.

The processor is essentially a high-quality digital audio unit, containing a dedicated and quiet Linux computer, with a highly-stable specialized operating system, coupled to an audio stage consisting of audiophile-grade (D/D, D/A, and A/D) converters and components. It is designed to be the purest and most transparent digital component of any hi-fi chain in which it is embedded. Its operation is very simple - only two controls are needed: 1) an on/off button and 2) a button to switch between various customized BACCH™ 3D Sound filters (corresponding to various listeners, and/or listening positions).