6:45 means 3 sets of 3, and then 33. Fifteen minutes later we get 8 and then 7. Every quarter hour we get 2, at the half we get 4, and the 3/4 we get 6. On the hour we get 8, plus however many hours it is. At 7:45 pm we get another round of 9 + 33, and then the regular numbers continue until 10:00 pm. I got up a couple of minutes early today to record the sound for you.