Spectrum Music Visualizer (com.ollie.visualisation) on Google Play
This music visualizer shows a few different patterns based on the spectrum of the music you play to it. It listens using the microphone on your tablet / smartphone and has a running display.Behind the scenes, it uses an FFT algorithm to analyse the waveform sampled from the microphone and make the spectrum analyzer.The frequency display has then been further manipulated to better differentiate lower frequencies in the display so you can "see" the tune better.Autorange function allows you to boost or reduce the volume of the input sound to give a better display.Touching the screen changes the colour effect.Stockley Software