How Music is used in the Beginning of August Rush

The very beginning of the film before there has even been any screen time, is the quiet drone of a few notes whilst dialogue is spoken very clearly about the music being all around. Then, as the black screen dissolves to the corn swaying, you realise the pulsating of the notes is in time with the swaying of the corn. Deeper base notes come in as we zoom out to the corn field in it's entirety, symbolising the large mass of objects we see. The music pulsates faster as Evan raises his hand to conduct the corn and the music he hears in it, almost as though the very movement of his own hand is creating music.
As we pull over the corn, now swirling in circles around Evan, like he is their commanding force, windchimes come in, accompinied by a shot of several stalks moving alongside the windchimes, as though the drone is the corn in it's entirety, but the windchimes are the individual stalks.
The music once again seems to rise and fall with Evan's hands. As we pull out even further over the swirling, twisting field, strings come in. This motif appears in August's Rhapsody at the end, so is a way to link the start and end of the film together.