I have tried but all I have is the voice recorder on the iPhone and it picks up next to nothing.
I will get one of the guys at the weekend to film it when I am up t'north at the Awesome open day.
It does make three great noises, as the turbo starts to spool it's like darth vader breathing
Lift off mid boost you get lots of chatter (which is my favorite noise)
Also you can really hear the DV modulating the boost when your pushing on with a logging run