I recently posted a video of a Hattons class 66 with the free ESU sound file. It's generated a lot of interest. I can supply it on a 21 pin Loksound 5 or MKL decoder with modified function mapping to suit the Hattons or Bachmann class 66 model.
Select the model required from the drop down list. For the Hattons model you can choose an optional EM2 speaker upgrade.