Funny I am building a new amp with error correction like it described. This is not exactly a new idea, even the Book by Bob Cordell talked about it. It mainly used in Class AB amps to minimize crossover distortion like the article said in the link.
I am at the process to bring the amp up. THD is 0.001%@1KHz and 0.0025%@20KHz driving 4ohm load and at 60Wrms. I have to listen to it to determine whether it improves the sound. As spec wise, it is NOT better than the Amp I already designed and built and in use for over half a year. In fact the amp without error correction has lower THD and cleaner looking. This is a case that you can talk until your face turn blue on how good and how much improvement with new technology. BUT the measurement doesn't pan out at all. I'll have the amp up in a few weeks and listen to it.
Own designed power amp, own designed preamp, JM LAB Spectral 913.1 speakers, Rythmik F12SE sub.
Not hooked up: Nakamichi Stasis PA-7 power amp, Velodyne VA1210 sub, Kef Reference Series center, Kef Bookshelf speaker, Monitor Audio bookshelf speaker, Infinity rear speakers. Acurus 3X200W amp.