Build your own Dirac Live!
Explore the expired and current patents, research papers, and design notes behind the most advanced room correction ever created.
Expired Patents
Expired Dirac Research patents created by the originators of Dirac Live, Mikael Sternad and Anders Ahlen
2004
Digital Audio Precompensation
Mikael Sternad and Anders Ahlen
Digital Audio Precompensation (Update)
Mikael Sternad and Anders Ahlen
2007
Current Patents
Current Dirac Research patents covering Bass Control and Active Room Treatment
Audio Precompensation Using Support Speakers
Lars-Johan Brannmark, Anders Ahlen, and Adrian Bahne
2017
Reducing Phase Difference Between Audio Channels at Multiple Positions
Lars-Johan Brannmark and Jakob Agren
2019
2023
Bass Management In Audio Systems
Lars-Johan Brannmark, Jakob Agren, and Frans Rosencrantz
Research & Design
Design and mathematical background of Dirac Research patents by founders Mikael Sternad, Anders Ahlen, former CEO Mathias Johansson, and current Chief Science Officer Lars-Johan Brannmark
On Room Correction and Equalization of Sound Systems
Mathias Johansson
Derivation and Design of Wiener Filters Using Polynomial Equations
Anders Ahlen and Mikael Sternad
Polynomial Methods Chapter 5 - Optimal Filtering Problems
Anders Ahlen and Mikael Sternad
Controlling the Impulse Responses and the Spatial Variability
Lars-Johann Brannmark and Mikael Sternad
Optimal and Adaptive Feedforward Regulators
Mikael Sternad
Robust Sound Field Control for Audio Reproduction - Chapter 2
Lars-Johan Brannmark (PhD Thesis)
Sound Field Control Using a Limited Number of Loudspeakers
Mathias Johansson, Lars-Johan Brannmark, Mikael Sternad
Polynomial Methods Chapter 3 - LQ Controller Design and Self-Tuning Control
Anders Ahlen and Mikael Sternad
Robust Sound Field Control for Audio Reproduction - Chapter 5
Lars-Johan Brannmark (PhD Thesis)
