Serato DJ Intro 

Play music, sync and beat-match files for custom DJ mixes. Access your music library, generate a waveform representation for the currently playing audio, and quickly sync sounds. Save and restore multiple mixes, use the multi-track non-linear editing rack for adding effects and transitions.

Serato DJ Intro is all about parties and mixing music. Beatmatch and scratch music files from your computer with Serato's ground-breaking colored waveforms and sync your sounds for fast and accurate mixes.