Trifield LR→LRC Decoder DSP

Component for foobar2000 v1.5 and newer.

foobar2000 v1.4 version available here.

foobar2000 v1.1 version available here.

Released:2023-03-16 12:05
Size:48.6 KB
License:GNU Affero General Public License





An implementation of Michael Gerzon's Trifield decoder.

The Trifield process is a form of audio rendering in which a conventional two-channel stereo signal is decoded (using Ambisonic principles) to an additional number of loudspeakers, typically three in the form of a Left-Center-Right front stage. The technique provides significant improvement to image stability, especially when the listener is moving or off-axis. It also addresses the problem in conventional stereo, where center images are recessed and less distinct due to the comb filtering arising from two sound sources emitting correlated signals.


1.1.4 (2023-03-16):Recompile with latest SDK and foobar2000 v1.5 compatibility.
1.1.3 (2022-02-05):Added dark mode support
1.1.2 (2018-08-27):Fixed left and right channels being reversed
1.1.1 (2018-01-06):No changes in functionality. Dynamic C runtime version for foobar2000 v1.4
1.1 (2017-06-07):Added more information to the about dialog. Lowered minimum crossover frequency to 350 Hz. Removed 192 kHz upper limit for sampling frequency
1.0 (2017-06-02):Initial version