We stayed at BLT last Jan, and it was like clockwork! 10:10 is when we heard it every night... In the winter, since it was darker and colder, we were in our room earlier each night... DH and I got a little silly by the end of the trip - there's only so much of that electrical music one can take without joining in!! DS had no problems sleeping through it all! Good disney fun
I've completely digressed from the OP's question, but just know the schedule is accurate! Have fun!!