Are you talking about the McGurk effect? You hear either Ba or Fa depending on which you expect to hear based on the lip reading (but the sound that is actually

Are you talking about the McGurk effect? You hear either Ba or Fa depending on which you expect to hear based on the lip reading (but the sound that is actually playing is Va): https://youtu.be/G-lN8vWm3m0?t=77 https://youtu.be/G-lN8vWm3m0?t=77 It is really cool that small contextual information can change our senses so dramatically without us being aware of it happening.