TD8 #29: Descending Triads

This device is something I heard on the second "Harry Potter" soundtrack by John Williams. Here's what I liked: 

1) The movement you get from the strings arpeggiating the harmony.

2) How the very soft doubling of Violins 1 in the celeste (an octave higher) gives it a subtle sparkle.

3) The way the harp adds to the pulse with a very simple pattern.

4) The way the "melody" moves through the different registers blending into each new group of instruments in the woodwinds.