Listen To Yoda, Obi-Wan, Luke, Darth Vader & Palpatine In Star Wars: The Force Awakens
Listen to the secret dialogue in the Star Wars: The Force Awakens Rey flashback scene.
We already knew the scene featured Yoda and Obi-Wan (voiced by both Alec Guinness and Ewan McGregor), but apparently it features Mark Hamill as Luke Skywalker, the breathing of Darth Vader and Palpatine as well.
The Mike Zeroh YouTube channel put the video together, which first plays what we hear in the movie, and then later amplifies the sound so it can be heard a lot clearer. Cool video.