Sentinel: Descendants in Time Hints

The apparatus by the globe-shaped object (with wind-flaps).

  • 1 of 3: The lights on the round floating object flash in the following order: yellow, red, purple, green.
  • 2 of 3: These lights can be translated into the following sounds: tuba, fog horn, air horn, and metallic horn.
  • 3 of 3: The horn sounds can be entered into the apparatus nearest the round floating object by using the horns in the following order: use the fourth horn (from the top), then the top horn, next the bottom horn, and finally the second horn.