RESEARCH — RENDERING ALGORITHM
XTC
Transaural Crosstalk Cancellation
XTC delivers binaural imaging on loudspeakers by cancelling the acoustic crosstalk between channels — 3D sound from a stereo pair, without headphones.
THE PROBLEM
Binaural collapses on speakers
Binaural sounds spectacular — on headphones. On loudspeakers, each ear hears both channels and the 3D image collapses. Classic crosstalk cancellation fixes it for one head position, a few centimeters wide.
HOW IT WORKS
How it works
Crosstalk cancellation
Inverse filters cancel the path from each speaker to the opposite ear, preserving binaural cues.
Robust sweet spot
Regularized filter design trades extreme cancellation for a usable, stable listening area.
Head tracking — the sound follows you
With camera or AirPods head tracking, the filters re-steer in real time: no fixed sweet spot, the 3D image follows the listener.
UNDER THE HOOD
Going deeper
XTC builds inverse filters that cancel the path from each speaker to the opposite ear while preserving the binaural cues, with a regularization that trades extreme cancellation depth for a robust, usable listening area.
With head tracking — camera or AirPods — the filters re-steer continuously: the sweet spot follows the listener instead of pinning them to a chair.
AT A GLANCE
At a glance
| Input | Binaural stereo |
| Output | 2 or more loudspeakers |
| Latency | Zero added |
| Implementation | C++17 · RT-safe |
| Availability | OEM licensing |
PARAMETERS
Hands on the algorithm
| Speaker geometry | Angle and distance of the pair |
| Regularization | Cancellation depth vs robustness trade-off |
| Head tracking | Camera or AirPods, optional |
| Output | 2 or more loudspeakers |
POSITIONING
Compared to the alternatives
vs headphone binaural
The same 3D cues with no headphones — listening stays social.
vs static transaural
Without tracking the sweet spot is centimeters wide; with it, the image follows the listener.
APPLICATIONS
Where it fits
Soundbars & TV
3D imaging from a stereo pair — no surround speakers, no headphones.
Automotive
Driver-focused binaural rendering from door speakers.
Desktop & gaming
Spatial audio on nearfield monitors, with tracking option.
Kiosks & exhibits
Localized 3D audio in public spaces.
INTEGRATION
Built to live inside your product
| Delivery | C · C++ · MATLAB · .dsp — full source code |
| Platforms | macOS · Windows · embedded targets |
| DSP platforms | Flow DSP · Audio Weaver — solutions in preparation |
| Documentation | Whitepaper — every algorithm explained, in the clear |
OEM LICENSING
- ■ One-time payment per brand
- ■ Full source code — C, C++, MATLAB, .dsp
- ■ Whitepaper — all algorithms explained
- ■ Integration support included
- ■ Free updates
- ■ Volume discounts on multiple licenses
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