Revolution

I think your interpretation makes sense, although for the background and foreground interpretation, wouldn't it make more sense that you label the instrumental portion as the foreground because it draws the listener's attention more? Whatever draws the attention of the listener the most should be the foreground, even if that is the instrumentals instead of the vocal part. I think in that sense maybe you're a little bit backwards, but you're right about the constant changes and evolution of the song, so maybe there is an argument for both being the foreground/background at different points.

You really broke down all of the parts of this song, which was helpful in listening. One of my favorite parts of the song was the beginning. Usually in songs, we have a certain instrument start it off quietly and build up with other instruments being layers onto the song and then finally the vocals. This song was basically the opposite- the instrument that introduced us to the song was the vocals, which then stayed in the background while other instruments such as the percussion layered onto the foreground.