Flashing LED lights are good, but they will work better if they can synchronize with the surrounding sound or music. [mircemk] has built lumazod visualizer to achieve this, which relies on some staple manufacturer components to achieve this.
The build is open source and is designed to process strings consisting of 60, 120, or 180 ws2812b LEDs. Arduino nano is responsible for running the program and capturing audio through its analog-to-digital converter. The sensitivity potentiometer can set the input level appropriately.
On this basis, fast Fourier transform is carried out to provide the data of audio intensity in various frequency boxes. Lumazoid can be set to respond only to bass or to all frequencies as a whole. The data is then used to pulse the LED in time with the beat.
This is an interesting project that demonstrates the basic techniques needed to build audio reactive visualization tools. We’ve seen some other great builds in this area before. Play the video after the break.
