Hopefully, someone who knows more will answer, but from what I have read, it is similar in many ways to Turtle Talk at Epcot. There is apparently not a scripted pre-recorded show, but CMs off stage control the characters and what they say in response to what is happening in the audience.
According to the WDW Guidebook for Guests with Disabilities, Turtle Talk has "Assistive Listening devices which amplify the audio at this location are available at Guest Relations."