It's just a very long NFB loop. The patent application should have failed on the ground of prior art ;-)
Not NFB but feed forward , he generates inverted distortion which is then mixed with flawed original out of phase, but never travels backwards.
The BIG problem is time/phase matching signals within microseconds error which is technically impossible.
The BIG problem is time/phase matching signals within microseconds error which is technically impossible.
My patent idea is better: ask the orchestra and the singers to play and sing a bit (inversely) distorted, so that the net playback output will be distortionless.