Tomography is imaging by sections or sectioning.

In this song, the piano is split into 3 tracks for the right hand, and 2 tracks for the left hand. The tracks are panned to spread them apart. Each track is faded in and out separately to combine them in different ways. The intent is to let the listener examine each piece by hearing what happens when a track is NOT there.

The French horns are similarly split into 2 tracks. Nothing very fancy is done with these tracks, just some simple fading at the start and end.

The drums are split into 3 tracks, but only the high hat is actually separated. The rest of the drums gradually fade in. Here I experimented a bit with sample delay, rather than panning, to avoid masking the other stuff that was going on.

Finally at the end all the pieces are brought together to form the whole object.