[2019] New Cortana Audio from "Discovery Hope"

A guy on twitter, Xepyal, found a QR code hidden in the Halo Infinite "Discover Hope" trailer that led to a piece of audio with Cortana saying some very interesting things!

Link to the audio

Xepyal's discovery

Transcript:

[someone walking. A sound like when Cortana's hologram avatar appears in Halo 4 and 5 plays]

Cortana: This...this is part of me. I don't know why, I don't know how, but it is me.

EDIT: Interesting new discovery! The audio syncs pretty well with Chief walking into the "Control Room" in the Discovery Hope trailer. Maybe this audio is set after the trailer cuts to black?