bouncing ball
device used in motion picture films and video recordings to visually indicate the rhythm of a song, helping audiences to sing along with live or prerecorded music
en-GB/ˈbaʊnsɪŋ ˈbɔːl/
en-US/ˈbaʊnsɪŋ ˈbɔl/
device used in motion picture films and video recordings to visually indicate the rhythm of a song, helping audiences to sing along with live or prerecorded music