The DCD-1510AE features the same Advanced AL32 Processing of Denon’s high-class DCD-2010AE. This technology dramatically enhances information volume from the CD to produce a sound more faithful to the original. The DCD-1510AE also has a USB (Universal Serial Bus) port for directly receiving digital tracks stored on an iPod or USB (Universal Serial Bus) memory. When digital audio signals are input from an external device, they pass through Advanced AL32 Processing & other circuits developed by Denon to maximise sound quality, allowing you to experience a depth of sound not possible with the portable audio device by itself.