OK so I went ahead and bought the Masterclass software, and after listening to it for a few hours, wow it really does work the A+ processing. Everything is more emotional, more musical, and without degradation of sound (there is a difference when one turns A+ on and off, always in favour of the A+). I already have high a hi-end Naim/Dynaudio system and it makes quite an improvement. I can't go back to listening to music without A+ now. The Maker of the software will not rightfully give away his trade secrets, but one hardly needs to worry about that in my view once I heard what the A+ does. Plenty of samples on his website, and I listened to the samples carefully many times, and was convinced. It's easy to hear the musical difference, the music without A+ sounds boring and lifeless by comparison, and has digital traces. With A+ all digital traces are completely gone and it sounds like real music, instruments and sounds previously blurred are now clear to hear and understand. And this is only with A+, I turned the EQ off.