Frank Oz describes to Neil deGrasse Tyson part of the process of coming up with the Yoda voice.
"Yoda Lingo 101 | StarTalk," National Geographic, February 2, 2018, accessed February 27, 2023
Tyson: So you invented the voice?
Oz: Yeah.
Tyson: Did anyone tell you, speak this way? How could anyone possibly tell you to speak that way, because no one had ever spoken that way before?
Oz: Right. You know why he says that? Why he talks that way?
Tyson: I've no idea.
Oz: There's always a reason for something.
Tyson: I've come to learn that as a scientist. Yeah?
Oz: My view of it is- first of all, it was Larry and George who wrote it- and I said, hey, this is nice- they use it halfway, and I said, can I do it all the time? They said yeah.