I'm a sound engineer for the play my school is doing. At one point, which the director has warned me could vary each night, the music that will be playing out of my laptop and into the mixing desk will need to slow down, as the characters take some drugs and it needs to get a bit psychedelic and weird. I don't know, however, how best to manipulate this speed change? The only idea I've have is to use my budget to buy a digital DJ deck/turntable which has a speed control on it and run the music through that. If that's the best option, can anyone recommend a turntable?