The sound was recorded during the Ingenuity's fourth test flight on April 30.

Ingenuity flight four still scheduled for later Friday; flight five in a week or more

Engineers blame software issue, will try again Friday

In third flight, scientists say the tiny craft exceeded tests conducted on Earth///

Mission control confirms the first aircraft flight on another planet 

If all goes to plan, 4-pound (1.8-kg) whirligig will slowly ascend straight up to an altitude of 10

Software updates will push back initial test fight from Wednesday to at least next week