Raz has been played on NTS shows including One Vice Left, with Pump It Up first played on 17 October 2014.

Raz is the alias of Chicago DJ Ralphi Rosario. He virtually coined the phrase "house music" along with the crew of Chi-Town radio show Hot Mix Five. Through this channel, he was able to blast Chicago's airwaves with the new and exciting sounds of house music for most of the 1980s. 1987 saw the creation of his most well known release - You Used To Hold Me.