The BACCH® Stereo Purifier (BACCH-SP) is a state-of-the-art, high-definition, digital audio processor, developed by Theoretica Applied Physics, that yields highly realistic 3D sound imaging from a pair of stereo loudspeakers.
At the heart of the BACCH-SP is BACCH® 3D Sound technology developed at P
rinceton University, which purifies stereo audio signals from the crosstalk inherent in loudspeaker-based playback, allowing the listener’s brain to receive the proper psycho-acoustical cues that are needed to localize recorded sound sources realistically in 3D space.
The BACCH-SP is the most advanced digital audio processor for music playback today as it incorporates, for the first time outside the laboratory, a number of advanced technologies that combine to offer what amounts to a virtual reality sound experience for the audiophile
These technologies include:
- Individualized tonally-transparent crosstalk cancellation filters (called BACCH® filters) designed from quick calibration (impulse response) measurements made by the listener using calibrated binaural microphones placed in the listener’s ears.
- Real time adjustment of the 3D audio sweet spot though high-spatial-resolution
tracking of the listener’s head position (even in pitch darkness) using a 3D infrared
camera and advanced custom-built head tracking software.
- 64-bit audio processing through a dedicated multi-core CPU running custom-built
algorithms and optimized convolution engines.
- Wi-Fi-based control of all BACCH-SP functions through an intuitive and aesthetically
pleasing iPad controller on a dedicated iPad that serves as the sole remote control.
Link to developers site: