You don't get it. It is irrelevant whether or not you memorize the audio on Space Mountain Florida. Because it is a continuous audio loop, and not tailored to your specific vehicle, you will never be able to use your memorized audio to anticipate drops and turns.
I think what he meant was that even though the audio does not make it possible to anticipate drops and turns, he knows where the drops and turns are anyway!
That's how it is for me, being a frequent rider!
Omega Track, from memory, after the lift-hill:
SPOILER ALERT!
"Teaser dip"
Right hand U-turn
Straightaway
Descending left hand spiral
Straightaway
Uphill
Descending right hand spiral
Straightaway
Lefthand turn, straightaway
Uphill (with frontseat airtime!)
Lefthand turn
Straight drop #1 (with backseat airtime!)
Straightaway
Lefthand turn, short straightaway
Lefthand turn, short straightaway
Straight Drop #2 (next to lifthill, with backseat airtime!)
Short straightaway
Lefthand turn, short straightaway
Lefthand turn
Straight drop #3 (with backseat airtime!)
Straightaway, left hand circular ascending turn
Straight drop #4 (the biggest, with backseat airtime!)
Straightaway, right hand circular ascending turn
Straightaway
Right hand long descending spiral, straightaway
Right hand turn, straightaway
Left hand turn, straightaway (re-entry tunnel)
Left hand turn, straightaway (brakes)
Right hand u-turn, straightaway
Left hand u-turn, straightaway
Unload
Alpha is, of course, an almost identical mirror-image, with "left" and "right" turns reversing.