From Pure Studio:
Pure DJ for Windows 8 features mix two songs together, rotate the record to scratch, rewind, and jump forward in the song, built in sound effects and transition effects to add excitement to your mix, built in Auto Transitions to mix songs with the touch of one button, use Cues and Loops to manipulate the songs, and preset your DJ playlist. Use your finger/mouse to rotate the record slightly backwards repeatedly to create a rewind loop effect. To make a smooth transition, start playing the next song at low volume and at the right moment, use one of the Auto Transition buttons to switch to the next song with ease. Navigate throughout the song using the record for small jumps or the Song Progress Bar for large jumps.