Whitelabel audio files are a unique file format (file extension .wl.mp3) developed by Serato. They are specially prepared for use in Serato DJ - with files pre-analyzed, tagged with song and artist info, BPM and album art where possible.
Whitelabel audio files play as high quality 320kbps stereo audio in Serato DJ when your hardware is connected. Without an Serato DJ hardware connected, or when playing these files through other mp3 software and devices, they will play as low quality 32kbps mono audio.
Whitelabel audio files are promotional releases from records labels available to Serato DJs for free from Whitelabel.net.