Delta Airlines Airbus A321-200 Takeoff from Austin, Texas

Beautiful morning takeoff on the way to NYC via Atlanta.
This is also the first time I've heard a unique 3 tone melodic chime on any airplane I've ever been on as we taxi....Any idea what it means?

[@IFlyPlanes]

The melodic tune is the seatbelt beep in a way - It can mean a lot of things, like "safety briefing done" or that a pilot would like a crew member to come up to the flight deck!

[@gamingwithlydia8848]

MY HOME AIrpoRT!!