Tunnel Blocker Music Vis. is a free Android multimedia app developed by Cypher Cove. This app serves as both a music visualizer and a silent audio player, allowing it to use the audio tunneling feature on some phones, so other music played on the device can work with music visualizers. The app runs a persistent service with a silent audio player that occupies the audio tunneling feature, preventing media players from attempting to use it. The service itself uses very little battery, simply starting to play a blank audio file and pausing it. The app is a useful tool for music enthusiasts who want to enjoy a music visualizer while listening to their favorite songs on other media players.

It is worth mentioning that the developer, Cypher Cove, credits h6a_h4i for finding a workaround for the audio tunneling problem. For those interested, h6a_h4i has an app called Music Visualizer that is also worth checking out.