This reminds me of my experiment conducted for a vinyl shop owner/family of viola/cello players so they could teach me about why vinyl is so good, lol (I'm taking liberties with their intent - they probably knew I didn't know what the $%@ I was doing.)
What they had me do was get a monophonic vinyl record and compare this with a stereo one, and a CD. Piano recording. (I did this with the help of a guy who won a Grammy for their remastering one of Disney's old classic musical soundtracks - so it was entirely unscientific and off the cuff, but I blindingly trusted this person to confirm what I heard).
When you live in a wood-floored house with hallways and rooms off to the side, and you have your speakers in the main living area (which had varieties of wood as well as a fireplace with some stone/brick), the mono vinyl recording travels all over the house. You can go into the rooms off to the side of the hall, and hear a clear piano recording.
So their basic point was that stereo recordings (minimization of this with different mic setups may also be a factor), at least when reproduced by speakers, were creating cancellation, some even at inaudible higher frequencies that impacted lower frequencies. Whatever the frequencies and inter-impact between them, this apparently reduced the liveliness of the physical result. When you produce an accurate representation of higher frequencies, isn't it possible that they bounce around and creating some positive cancellation? C'mon, it could be positive. You have to be open to this sort of thing. Okay, okay, cancellation and wave interactions are all bad, bad, bad, bad. Sadly then, no benefit ever comes from inaudible-frequency waveforms