iTunes and iOS devices offer a number of ways to tweak the sound during playback. You can use an equalizer to adjust certain frequencies, use Sound Check to normalize the volume of different tracks, and use Sound Enhancer to, well, enhance your sound. There’s also Crossfade Songs, which lets you play songs so they segue from one into another. Here’s what you can do to fiddle with your sound in iTunes and on your iOS device.
Read the rest of the article on Macworld.