22 iPod EQ preset curves fine-tune the sound from iPod sources for unprecedented sound quality: Available curves: Acoustic, Bass Booster, Bass Reducer, Classical ,Dance, Deep, Electronic, Flat, Rock, Small Speakers, Spoken Word, Treble Booster, Treble Reducer, Vocal, Booster, Hip-Hop, Jazz, Latin, Loudness, Lounge, Piano, Pop, R&B