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.

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.

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.

BACCH4Mac Configuration Options

BACCH4Mac Packages
BACCH4Mac Pro BACCH4Mac Audiophile+ BACCH4Mac Audiophile
Full functionality for audio professionals and technically-savvy audiophiles. 3D imaging over loudspeakers and headphones for discerning audiophiles. 3D imaging over loudspeakers for discerning audiophiles.
Includes stereo purification, 3D audio rendering over a pair loudspeakers or headphones, head tracking, advanced diagnostics, 3D audio mixing, and binaural audio content creation. Includes stereo purification, 3D audio rendering over a pair of loudspeakers or headphones, and head tracking. Includes stereo purification, 3D audio rendering over a pair of loudspeakers, and head tracking.
BACCH® 3D Sound over speakers (B3DS)
Head tracking for B3DS
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 and upgrade support
Technical and upgrade support renewal (annual) $998 $648 $448
RME Babyface Pro
BACCH-BM Binaural Microphone
BACCH-BM Pro Upgrade (Optional)*
Pre-Configured Mac Mini (Optional)**
Webcam (Optional)

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

$6,980 $5,980 $4,980

** 2012 Mac Mini with Quad-Core i7 2.6GHz, 16GB RAM, and 256GB SSD (which remains the best Mac Mini model for audio processing) pre-configured with BACCH-dSP.

— ships within 2 weeks —
Promotional Offer: To get HDtracks' promotional offer of 10 free Chesky Binaural+ albums of your choice with the purchase of a BACCH4Mac package, use the Promotional Code "BACCH4CHESKY16" at checkout.
Technical Requirements: The BACCH-dSP software requires a recent (2012 or later) Mac Pro, Mac Mini, iMac, or MacBook Pro with a minimum of 16 GB of RAM, running Mac OS 10.7 (Lion), 10.8 (Mountain Lion), 10.9 (Mavericks), 10.10 (Yosemite), 10.11 (El Capitan), 10.12 (Sierra). Starting with version 3.5.1 (released October 13, 2017) BACCH-dSP is now fully compatible with Mac OS 10.13 (High Sierra).
Return Policy: The BACCH4Mac package can be returned within 14 days from the shipping date if there is no functional or cosmetic damage to the hardware during the trial period. The BACCH-dSP software can be run in trial mode (with full functionality) for 14 days from software installation. Shipping is covered by the customer. Since the in-ear BACCH-BM binaural microphones require plugging into the ear canal and must be refurbished after a return, all returns will be subject to a 15% restocking fee.

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