Sparkfun DEV-13116 Shield 1 pc(s) Compatible with (development kits): Arduino

The Spectrum Shield allows your Arduino to split a stereo audio input into 7 bands per channel. You can then read the amplitude of each channel with the ADC of your Arduino, so that you can control everything from LEDs to motors, pumps, relays or even fire, all with sound. With this sign you can enable almost any project to react to music or sound!
The Spectrum Shield features the MSGEQ7 graphic equalizer display filter. Two of these ICs allow you to split a stereo audio input into 7 bands (per channel) and read the amplitude of each through the ADC of your Arduino. The shielding is equipped with two 1/8" stereo jack sockets (as with a pair of headphones). One is a stereo input and the other is a through output that allows you to connect the Spectrum Shield inline between your audio source and your stereo system without interruption. This revision of the Spectrum Shield has been updated to the Arduino R3 layout, but still requires you to solder to your own headers (see Recommended Products section below). This shield can be used to create sound visualizers, detect patterns in music, or add sound activation to your microcontroller projects.

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