I know it's nitpicking, but that moment felt weird and out of place to me.
It's not about the music itself, it's about the hope of something beautiful existing beyond the stone walls of Shawshank - that Andy found something that wasn't meant to be found in such a place.
A great movie across the board, from its script to its characters and certainly the look and feel of bleakness it gives us inside a prison. Arguably the greatest prison movie ever, though I personally like Grand Illusion and Lumet's underrated The Hill slightly more. Doesn't matter, they're all great.
Oh and Escape Plan obv. You have Ahnold AND Sly? What could go wrong?