Sweeney Todd Johanna Reprise

This feels like one of those Yanny/Laurel, Black dress/gold dress things. I'm pretty sure the 4th note IS down the octave in the OBCR, but I've been playing it over and over, and sometimes I do hear it as up the octave like you do.

Forgive me if I'm misusing this term, but I believe this might me an example of overtones? I think there is some kind of resonance in the reverberation that makes both the lower octave and the higher octave audible. I'm sure I'm misusing terms all over the place, but my point is that I think somehow both notes are present at the same time. Try listening for the lower octave on the OBCR and you might hear it too.

OBC 4th note is higher from what i hear...i wonder why the difference?

That fourth chime note sounds higher to me here on this fan recording of the original cast/production.

https://youtu.be/ISp5sjaSnl0?t=5330

And here from the taped tour it sounds more like an overtone?

https://www.youtube.com/watch?v=XGxx_5Qolq8