BACCH-dSP is the most advanced stereo 3D imaging and binaural audio processing tool available today, and is used by

1. Audiophiles seeking true 3D imaging of existing stereo recordings through 2-channel loudspeaker systems.
2. Audiophiles wishing to emulate their 2-channel loudspeaker systems over headphones.
3. Musicians, composers, and audio professionals interested in binaural audio mixing and production.
4. Researchers, developers, and educators exploring applications of higher-order ambisonics (HOA) at the cutting edge of audio technology.

BACCH-dSP incorporates many techniques, algorithms, and methods that have only recently evolved out of the research laboratory, and allows for the construction and rendering of stereo 3D audio images with breathtaking realism.

It is the result of many years of continuous development by Professor Edgar Choueiri, President of Theoretica Applied Physics and Director of Princeton University’s 3D Audio and Applied Acoustics Laboratory.

BACCH-dSP can be easily configured as a parallel processor for the leading DAW applications (e.g. ProTools, Logic Pro, Ableton Live, etc.) or as a standalone application for processing audio from audio files, and audio from audio file players (Roon, iTunes, JRiver, etc...) and streaming services (Tidal, Spotify, etc...).

The wide functionality of the BACCH-dSP includes the following main features:

1. Quick and easy design of individualized BACCH® filters for rendering binaural audio (and regular stereo recordings) in full 3D over a pair of loudspeakers.
2. Quick and easy design of individualized BACCH-hp filters for rendering highly externalized 3D audio from headphones.
3. Advanced head-tracking for real-time dynamic sweet spot adjustment for seamless 3D audio over a wide range of listener locations.
4. The powerful BACCH-3dm mixer for precise mixing of audio sources in 3D space.
5. Quick and intuitive design of 3D trajectories for moving sources in 3D space.
6. Extensive automation integration with the leading DAWs.
7. Powerful Higher-Order-Ambisonics-to-binaural rendering and 3D soundfield navigation.
8. 2-band and 3-band crossover network with 2nd and 4th order Linkwitz-Riley filters.
9. Diagnostics and measurement tools for binaural audio.
10. The most advanced room correction technology available today.

(Available in the Audiophile+ and Pro editions)

The BACCH-dSP is the first product to use the newly developed BACCH-hp headphones technology, which resulted from a 4-year research project at Princeton University.

BACCH-hp filters, produced easily with the BACCH-dSP application, allow binaural audio to be reproduced through headphones with the following main features:

1. The 3D image is much more fully head-externalized than regular binaural audio.
2. Unlike regular binaural audio, head-externalization with BACCH-hp works equally well for all listeners.
3. Rotational head tracking allows fixing the 3D image in space which is critical for enhancing the perception of a realistic audio image outside the head.
4. Advanced equalization using the in-ear BACCH-BM binaural mic allows optimizing the sound of any headphones for BACCH-hp.

(Available in Pro edition)

The powerful BACCH-hoa module allows for up-to-fourth-order High-Order-Ambisonics-to-binaural rendering and 3D soundfield navigation using up to 20-speaker full dodecahedron virtual speaker system (in BACCH-3dm) and individualized HRTFs.

The BACCH-hoa module has the following main features:

1. Support for HOA mics with up to 32 capsules (e.g. the em-32 Eigenmike)
2. 32-channel HOA Recoroder and Player
3. Up-to-4th-order Ambisonics decoding to uniform virtual loudspeaker spherical arrays
4. Binaural rendering with individualized HRTFs and 6-degree-of-freedom navigation of the rendered 3D soundfield.

(Available in Pro edition)

BACCH-dSP 9.5 adds two sub-modules to the BACCH-hoa main module: BACCH-hs^3 and BACCH-sme.

I. The BACCH-hs^3 (head-steered sound spotlight) sub-module features a new ground-breaking technology that relies an HOA microphone to create a "high-order beam" that can be steered anywhere in 3D space (using the BACCH-HT-Nav module described below) by simply looking in that direction, to significantly isolate sound sources in the beam from the background.

The BACCH-hs^3 sub-module has the following main features:

1. Selectable HOA beam pattern, up to 4-th order hypercardiod, that allows up to 16 dB isolation from the background.
2. Accurate 3D head-tracked steering through the BACCH-HT-Nav module using virtually any regular webcam or infrared Track IR headtracking hardware.
3. Low-latency binaural rendering through 3D through headphones or earphones (ideally, capable of noise cancellation ) or BACCH-filtered 2-loudpseakers.

II. The BACCH-sme (stereo mic emulation) sub-module allows the accurate emulation of a variable-pattern pair of stereo mics for recording (or low-latency live monitoring) using a single HOA mic.

The BACCH-sme sub-module has the following main features:

1. 14 selectable beam patterns (omni, and 1st, 2nd, 3rd and 4th-order cardioid, supercardioid, and hyeprcardiod), for each mic in the stereo pair.
2. Beam steering in 3D, manually or through the BACCH-HT-Nav module using virtually any regular webcam or infrared Track IR headtracking hardware.
3. Presets for emulation of "XY", Blumlein, and "MS" stereo pair of microsphones.

(Available in the Pro edition)

This new module, first introduced in BACCH-dSP 8.0, allows binaural content creators (e.g. mixing engineers, musicians, composers, AR/VR audio designers) to easily and intuitively design/draw complex trajectories in 3D space for the sources in the 3D mixer to follow.

The 3D Trajectory Designer module has the following main features:

1. An easy-to-use and intuitive interface allows drawing simple or complex 3D trajectories in the 3dm mixer by hand or by precise 3D positioning of anchor points on the trajectory.
2. The speed of each source as it moves on a given 3D trajectory can be precisely controlled and the motion can be automated.
3. Automation of the motion of any of the 20 sources along drawn trajectories can be transmitted to any of the leading DAWs (e.g. ProTools, Logic Pro, Ableton Live), where it can be recorded, edited, and sent back to the 3dm mixer for playback.
4. Even the head of the "listener" can be made to move along a 3D trajectory, and its six degrees of freedom (x,y,z, pitch, yaw and roll) can be automated from the DAW.

(Available in the Intro, Audiophile, Audiophile+ and Pro editions)

The BACCH-Xover module allows the user to quickly design a crossover network through an intuitive graphical interface.

The BACCH-Xover module has the following main features:

1. 2-band or 3-band crossover network options for bi-amping or tri-amping applications.
2. 2nd or 4th order high-precision (64-bit) Linkwitz-Riley filters.
3. Adjustable delay time for each band up to 1 ms.