Equalisers! Now that is a useful feature. There are several to choose from: Off, Bright, Excited, Mellow, Relaxed, Vocal, Treble Boost, Bass Boost, Speech, Manual, Custom 1 and Custom 2. The default set of settings just about covers everything from audio books, movies, music and more.
Click on the cog at the bottom and you can create two custom Eq profiles. Some people will undoubtedly say 5 bands isn’t enough, but fear not. If you’re in that camp just set the EQ to off, and use your music players’ built in equaliser.