The 4-million-year-old black monolith has remained completely inert...

7 seconds sound clip from the 2001: A Space Odyssey (1968) movie soundboard.

You can hear this line at 01:56:49 in the Blu-ray version of the movie.

Quote context

[...]

- This is a prerecorded briefing made prior to your departure and which, for security reasons of the highest importance, has been known on board during the mission only by your HAL 9000 computer.

- Now that you are in Jupiter's space and the entire crew is revived, it can be told to you.

- Eighteen months ago, the first evidence of intelligent life off the Earth was discovered.

- It was buried 40 feet below the lunar surface near the crater Tycho.

- Except for a single, very powerful radio emission aimed at Jupiter...

- The 4-million-year-old black monolith has remained completely inert...

- Its origin and purpose still a total mystery.

(EERIE CHOIR)

(EERIE CHOIR) (2)

(UTENSILS CLATTERING)

[...]