BACCH4Mac is a bundle of four components:

  1. Theoretica’s BACCH-dSP software
  2. BACCH-BM binaural microphone
  3. RME’s Babyface Pro
  4. Webcam

It's designed to transform your Mac-based audio gear into the ultimate 3D audio playback system.


BACCH-dSP is a 3D audio powerhouse application for mixing and rendering 3D binaural audio over loudspeakers and headphones.

At the heart of BACCH-dSP is BACCH® 3D Sound, a proprietary technology developed at Princeton University that allows the listener to experience stunning virtual reality 3D imaging using only two loudspeakers.

It is the same technology that lies at the heart of Theoretica's critically acclaimed audio processor, the BACCH-SP.

The optional webcam lets you take advantage of BACCH-dSP’s advanced head-tracking for real-time dynamic sweet spot adjustment for seamless 3D audio over a wide range of listener locations.

To learn more about BACCH® 3D Sound see our FAQ page and the press reviews.

Learn more about BACCH-dSP...


The BACCH-BM are high-fidelity in-ear binaural microphones designed and built by Theoretica in Princeton, NJ, USA. With performance characterstics similar to Theoretica's flagship binaural microphone product, the BACCH-BM Pro, the BACCH-BM are used to generate personalized digital filters for BACCH® 3D Sound.

Simply plug the microphones into the Babyface Pro audio interface, perform a quick and easy calibration with BACCH-dSP that takes just a few seconds, and you're ready to experience BACCH® 3D Sound.

While the BACCH-BM are used for calibrating the BACCH4Mac system, they are also ideal for creating your own personalized binaural recordings. They require 48V phantom power, come with washable earbuds, and are individually equalized to generate a perfectly flat frequency response across the entire audio spectrum.

(The BACCH-BM is not inclcuded in the Intro Edition of BACCH4Mac.)

3. Babyface Pro

The Babyface Pro is a high-quality audio interface designed and built by RME in Germany. In BACCH4Mac, it is used to interface the BACCH-BM microphones with your Mac.

It can also be used as a digital or analog receiver. It has an optical SPDIF input (up to 192 kHz) to connect your preferred digital source (such as a digital audio streamer/server), and even has line level TRS inputs for your phono stage. Now you can experience your vinyl in breathtaking 3D.

You can choose to use the Babyface's built in D-to-A converters and connect directly to your amplifier or powered speakers, or you can connect to your own DAC via USB or TOSLINK. The Babyface Pro supports sampling rates up to 192 kHz.

(The Babyface Pro is not inclcuded in the Intro Edition of BACCH4Mac.)

BACCH4Mac Configuration Options

BACCH4Mac Editions
BACCH4Mac Pro BACCH4Mac Audiophile+ BACCH4Mac Audiophile BACCH4Mac Intro*
Full functionality for audio professionals and technically-savvy audiophiles. Customized 3D imaging over 2 loudspeakers and headphones for discerning audiophiles. Customized 3D imaging over loudspeakers for discerning audiophiles. 3D imaging over loudspeakers.
Includes customized 3D audio rendering over a pair loudspeakers or headphones, head tracking, advanced diagnostics, 3D audio mixing, and binaural audio content creation. Includes customized 3D audio rendering over a pair of loudspeakers or headphones, and head tracking. Includes customized 3D audio rendering over a pair of loudspeakers, based on acoustic measurements, and head tracking. Includes 3D audio rendering over a pair of loudspeakers, based on tape measurements of listening geometry.
BACCH® 3D Sound over speakers based on tape measurements (u-BACCH)
Customized BACCH® 3D Sound over speakers based on acoustic measurements (BACCH)
Head tracking for speakers listening
BACCH® 3D Sound over headphones (BACCH-hp)
Head tracking for BACCH-hp
Advanced headphones equalization (BACCH-hp-eq)
3D Mixer (BACCH-3dm)
Up-to-4th-order HOA (Higher-Order-Ambisonic) to binaural rendering and 3D sound field navigation (BACCH-hoa)
Advanced diagnostics and filter design tools
One year of technical support and BACCH-dSP app upgrades
Babyface Pro
BACCH-BM Binaural Microphone
BACCH-BM Pro Upgrade (Optional)**
Pre-Configured M1 Mac Mini (Optional)***
Webcam (Optional)

* The Intro edition does not come with any hardware and produces only u-BACCH filters, which give 3D sound over loudpseakers (with no head tracking) based on the user's input of two tape measuremets of the listening geometry. u-BACCH filters come close to the performance of regular BACCH filters, which rely on acoustic measuremts using the BACCH-BM in-ear mic, if the loudspeakers are well-matched in frequency and phase.

$6,980 $5,980 $4,980 $980
— ships within 2 weeks —

** The BACCH-BM Pro offers unmatched characteristics for its size and is ideal for high-fidelity master binaural recordings.

*** Apple Mac Mini M1 chip with 8‑core CPU, 8‑core GPU, and 16‑core Neural Engine, 16GB unified memory, 256GB SSD storage.

Computer Requirements: The BACCH-dSP application, which is at the heart of all BACCH4Mac editions, requires a recent (2012 or later) Mac Pro, Mac Mini, iMac, or MacBook Pro with a minimum of 8 GB of RAM. The latest version of BACCH-dSP (9.6) is fully compatible with the latest version of the Mac OS (11.x Big Sur), as well as all previous Mac OS versions down to, and including, 10.10 (Yosemite). It is also fully compatible with all Mac computers that can run these operating systems, inlcuding the latest M1 Macs.
Technical Support & Version Update Service Policy: All BACCH4Mac editions now include free and time-unlimited tech support, and version updates, for the first year (starting on the date the license is activated). Extending tech support and version updates for subsequent years can be purchased at $248 per year for the Audiophile Edition and above, and $148 per year for the Intro Edition.

Return Policy: The BACCH4Mac Audiophile, Audiophile+ and Pro packages can be returned,  subject to a 15% restocking fee, within 14 days from the shipping date if there is no functional or cosmetic damage to the hardware during the trial period. Shipping is covered by the customer. Theoretica offers full tech support during the trial period.


The BACCH4Mac Intro Edition (a software-only product), once purchased,  can be run in trial mode, with full functionality, for 14 days from software installation, and the purchase is fully refundable within 14 days from date of purchase, but once activated, or when the trial period ends, the purchase becomes unrefundable. Theoretica offers full tech support during the trial period.

For inquiries, please contact

"...the BACCH4Mac 3D Audio Playback System is ground-breaking technology...BACCH 3D breaks more ground than any digital technology I've encountered."

Michael Lavorgna, AudioStream