Enjoy your favorite music player in a highly customizable way with a 7-31 band equalizer, multiple sound presets, balance and pre-gain volume. Choose between 7, 11, 15, 21 or 31 bands for the equalizer - depending on how much precision you need. Whether you want to adjust uneven headphones with different frequency and volume output - or compensate a hearing loss - this app is for you. The ability to pinpoint a frequency band for a particular ear/side makes SpotEQ31 unique. From version 2.