Music visualization or music visualisation is animated computer-generated imagery based on a piece of music. The imagery is usually generated and rendered in real time, synchronizing with the music as it is played. The feature is found in electronic music visualizers and media player software.
Visualization techniques range from simple ones (e.g., a simulation of an oscilloscope display) to elaborate ones, which often include a number of composited effects. The changes in the music's loudness and frequency spectrum are among the properties used as input to the visualization.