Pioneer Pro DJ The DMP-555 is compatible with CD Audio and MP3 formats and will playback from both CD and SD Card. Since these are capable of storing a huge number of MP3 tracks and loops, the DMP-555 allows DJs to enhance their sets and mixes with the latest music from around the world. When the slim, compact and portable SD Card is used for mixes, the DMP-555 effectively becomes a sampler. This ground-breaking innovation is possible because MP3 loops can be BPM sync'd to the CD output and then fired on c...