Equalizer in a Hi Fi system

“Yes, I understand that @mahgister   but when we hear envelopment or surround dispersal of the 3 D soundstage but it’s coming from 2 front speakers it’s still the brain being tricked.”

everything we hear ultimately is two channels. Our right and left ears. Our brain deciphers cues based the difference between what the right and left ears hear. There are three main factors. Arrival time, amplitude and the head transfer function. Stereo cross talk messes up those cues by leaking those cues to the opposing ears. BACCH SP corrects that. So it actually is the only playback system that *isnt* a trick. And you can demonstrate the extraordinary accuracy of the system by using the in ear microphones to record someone at various positions in the room and then playing back that recording. It’s nuts. 100% accurate. 

A number can not be distorted. It can only be changed.

@mijostyn Yikes! THAT’s your defense of DSP superiority?? Then clearly you misunderstand what a digital stream is representing. The numbers are describing the analog waveform, and if you CHANGE the numbers, you are by definition, DISTORTING the resulting waveform. The numbers ARE the waveform! You can change the numbers in a perfectly linear fashion, as in simply changing the amplitude of the entire signal (gain, volume) --OR-- the stream of numbers can be fed through very complex equations that perform filtering operations on the signal (EQ). These equations can work really well, or really poorly. I’ve heard good ones, and certainly bad ones. There’s many many types of filtering algorithms, with new ones being devised all the time. Some are intentionally colored and vintage sounding, and some are clean and transparent.

@mirolab 

And you obviously do not understand digital signal processing. A number has meaning, distortion does not. That number represents amplitude, nothing else. When you change that number you change amplitude in a specific way. Distortion in meaningless. DSP changes the numbers in specified patterns to achieve a specific result. Can you change the numbers to replicate distortion? I'm not sure although I do not see why not. A number can not be distorted, it can only be changed. 

Analog? It is essential only because that is what our ears understand. The only components that should operate in analog are speakers and perhaps amplifiers. Everything else is way better off operating in digital. Good examples are broadcast radio and the cell phone. Compare Sirius radio to standard radio, old analog cell vs what we have now. People who think analog signal processing is better are stuck at about 1981. As you yourself have just described, you can go almost anywhere with DSP and not necessarily in good ways. That is up to the programmer. 

Again, both analog and digital advancements have come along since 1981.  Referencing your past experiences years ago with analog is irrelevant 

No more bashing either. They both can play a role in augmenting the audiophile listening experience