Cultural festivals are a staple of Japanese high school life, giving students an opportunity to plan and execute complex tasks and demonstrate their organizational ability. Most opt for something like a snack stand or a haunted house, but Takatsuki High School's Electric Physics Club chose to do something cooler: a Tesla coil that plays the opening theme to K-ON! Season 2, "GO! GO! MANIAC."

Tesla coils are high-voltage alternating-current transformer circuits often used for educational displays. Since electricity can create sounds by expanding and vibrating the air around it (think of lightning), they can also be programmed to play music. Hence this electronic take on the K-ON! song.

話題のテスラコイルでアニメけいおん!のOP GO!GO!MANIAC!を演奏してみた(https://t.co/TYXMxBoQ3K)の正面からの動画です

音のなる原理は簡単に言うと雷で空気を膨張させて空気を振動させ音を出してます pic.twitter.com/7tUdcymyRD — PERFECT HUMAN (@rinH91231) October 3, 2016

The same performance, but from a different angle.

EDIT: Here is a YouTube video of the performance. Thanks, Dragonmastr!

Source: Hamster Sokuhō