Audio Lab is described as 'For music fans, add some colour and great visuals to the experience with Audio Lab. It is a music visualizer that offers volume, pitch and beat detection' and is an app in the Audio & Music category. There are more than 25 alternatives to Audio Lab for a variety of platforms, including Windows, Android, iPhone, Android Tablet and Winamp. The best alternative is projectM, which is both free and Open Source. Other great apps like Audio Lab are MilkDrop (Free, Open Source), Magic Music Visuals (Paid), Avee Player (Freemium) and VSXu Ultra Artiste (Free, Open Source).
NestDrop allows you to perform with high-resolution high-fps visuals which react in realtime to the music and then broadcasts the video via Spout. Since the Milkdrop engine is at the core you can easily bring in your own Milkdrop presets.
Powelus's Audio Visualizer allows any person to customize visualizer to their own experience. The software has the capability to load local MP3 files and display audio spectrum during real-time playback.