why is it so hard to actively listen to the harmonies? it's super easy to hum the main melody but I have a hard time even making out harmonies that aren't in relatively quiet and small chunks, let alone humming them.
usually the harmonies are quieter. the part that is supposed to enter your brain is the main line. if you spend some time playing piano/keyboard, you'll start to understand what's going on, and then you'll be able to find harmony parts in your mind by imagining the chord formations on the keyboard