Okay, when I said ‘endgame’ you didn’t actually think I meant the real end, did you?
The hand signals in the above are all that mattered. They are Choral hand signals, and translate to:
Re Mi Do Do Sol D E C C G
We could go find an online piano or an NES tracker or something to play out these notes. Or, apparently, we could just naively search the internet for “Re Mi Do Do Sol”, because this tone sequence is just that well documented.
It’s the alien sound from ‘close encounters of the third kind’
Anecdotal note: At this point, about half of Council was watching us go through this part, so we simultaneously had more pressure and way more hinting than ordinary.