A while back

[Gdjjr]

I posted about seeing this and I recall someone wanted to see it, but, at the time I couldn't find it. Today I ran across it by accident, just like last time, but, this time I'm posting it for posterity, if nothing else.
Reverb.com has some neat articles-

Layer Detuned Acoustic Tracks for a Big Guitar Sound | Experimental Recording Techniques

Pink Floyd got lush acoustic sounds by varying tape speeds on doubled parts. We're detuning 6 tracks in Pro Tools to get achieve the same wide, chorused sound.

reverb.com