Record cubes were devices used to play music. The astromech droid R9-TR2 was capable of playing record cubes that provided the preferred soundtrack of the rebel princess Crane.[2]
Appearances
Star Wars: Visions — "The Song of Four Wings" (First appearance)
Sources
Star Wars: Visions Filmmaker Focus THE SONG OF FOUR WINGS on the official Star Wars YouTube channel (backup link)
Our Favorite Droid Sidekicks from Star Wars: Visions on StarWars.com (backup link) (First identified as record cube)