Ok so you clearly don't know what BBE does.
What BBE fixes is not a bad recording problem, it's a physics problem.
No matter how good an egineer is and how good is his studio still BBE fixes physics problems and not engineer/gear problems.
People with crap recordings in their houses is another story cause no gear can fix it, once recorded like crap, it'll always sound like crap, engineers can only make it sound less crap but still............crap.
When I said BBE's Magic Biggest Secret Finally Revealed, it was clearly a joke about that tv show which a magician reveals magic secrets, it was a joke.
No gear/engineer makes magic and that was my point explaining what BBE does.People think BBE will solve their crap recording problems but it'll not, they will only fix a physics problem which has nothing to do with bad quality recordings, it's a problem in any recording no matter its quality.
As an Engineer with a degree in EE, I can says by looking at the schematic, this is how BBE achieves what it does,
It looks like a 3 band splitter - multiband, this is achieved with what they call "pseudo state variable filter", phase shifting (band split) is present for each band.
The delay for the bands can be accomplished with a capacitor discharge, would be with separate buffer for this band, which stores the signal and plays it back with a delay.
There is a low-band amplification with a potentiometer which is not a low-shelf filter, this is just a band boost. Same goes for the 'process' knob, it boosts the top-band, for the top-band signal path we see voltage-controled-amp (VCA), which has its input voltage through a peak-detector. The peak-detector works with the non-filtered signal and increases/decreases the input voltage of the VCA. If the peaks in a signal are created by high frequencies, the summed voltage from the peak detector trough the VCA, should add more high frequency content and act like an exciter.
The input buffer, is just for impedance accomodation between the input (jack) and the next stages filter/pd, this is required in most cases.
The output buffer is a what its called a frequency dependent inverting operational amplifier. It doesn't amplifies frequencies above certain range (10khz for example). this can be used to compensate for the harmonic boost of the high end. after that i see a one pole high-pass filter (CR), which i think they use only to band-limit lower frequencies (for example below 10hz) - the capacitor C20 takes care of that.
This is really your basic Electrical Engineering 101.