I hear a loop ~22 seconds long of a falling tone. I can clearly hear the higher pitch tone fade in at the start of each cycle. I'm not such I get the "gets no h

I hear a loop ~22 seconds long of a falling tone. I can clearly hear the higher pitch tone fade in at the start of each cycle. I'm not such I get the "gets no higher or lower". I'm listening to this version: http://www.youtube.com/watch?v=DfJa3IC1txI http://www.youtube.com/watch?v=DfJa3IC1txI