Using an acapella (the isolated vocal track of a song) is one of the most powerful tools in a DJ's arsenal.
The Live Mashup
Take a recognizable Pop or Hip-Hop acapella and play it over a driving Tech House or EDM instrumental. Ensure both tracks are in the same key (Harmonic Mixing) and tempo. This instantly creates a unique moment for the crowd.
The Transition Tool
If you have an "Acapella Out" edit (where the beat stops and the vocal continues), you can use that vocal tail to smoothly mix in a track of a completely different genre or tempo without a clashing beat.
You can download thousands of studio-quality Acapellas and Acapella In/Out edits at RPOOL.ID.