Just one example:
In the Finale of Bruckner's 4th, there's a passage where the bass tuba, horns, trumpets, and trombones play four ascending notes in unison (at around 1:45 in this recording). They are somewhat forceful (I mean, it's Bruckner, right?!
), and so it's kinda "expected," I would say, that the different instruments melt together into one to a certain degree. With all the DACs I had before, those notes sound like they are made up of four consecutive chords played by one single instrument. With Gumby, I hear them as distinct notes created by distinct instruments coming from distinct locations in space.
When I heard this passage for the first time earlier today, it borderline shocked me.