This is the new Xbox Series X startup sound

[Windows Central]

Microsoft reworks the iconic Xbox start-up sound, taking a new angelic form with Xbox Series X.
Microsoft continues its unveiling of Xbox Series X, on track to debut its first gameplay from the console on May 7, as a part of a scheduled partner showcase. The event promises our first glimpse at the upcoming next-generation device running a variety of third-party titles, with the newly-unveiled Assassin's Creed Valhalla among confirmed features.

Full story from the WindowsCentral blog...