When you use the function to record the movement in real time with the puppet tool, you can no longer hear the audio preview of the video. It is from the 2014 version that this bug is present...

I used to use the puppet tool animating the pins in real time while the audio of the video was played. Since the after effects 2014 version there is a bug that no longer plays the audio of the video while animating the pins in real time, making the tool uncomfortable or impossible to use in case you are animating a character that speaks...