Download this free After Effects template and render out an instant 3D waveform in HD or 4K. It's great as an audio visualizer, using particles to create abstract visuals that react to the frequencies of your music. 
 
Simply drag in your audio, then use the slider controls to customize the look and behavior. This visualizer is just one of 30 custom audio visualizers included in the "Pulse" pack from Creation Effects. Pulse includes a variety of audio-reactive animations and audio-driven effects for your footage. Check out the video on the Pulse webpage.