I heard traces of this on the N:A streams of the beginning of Route C... I didn't realise at first it was a a remix of default City Ruins theme. But the lyrics totally give it away.
Still getting blue balls from wanting to play it since Sis is having her place overhauled and I can't drop by for her PS4 though.
And just as addition:
(I don't remember if player even gets to control 9S at that point... since transition to 8-bit usually happens during hacking minigames. Or maybe it's for when the player pops an E-Drug?..)