Welcome to our shop! The filter board offered here is a versatile tool that can be used to create an audio analyzer for tracking the frequency information of music. With this board, your controller can interact with the music in various ways. This filter board has multiple applications, including capturing the music spectrum, creating interactive robots that respond to music, processing audio data readings, generating lighting special effects, and performing voice analysis. To ensure flexibility, the board provides a potentiometer that allows you to adjust the input amplitude, with a typical required amplitude of 20dB for the input signal. The audio signal will be filtered into 7 frequency bands by this module, specifically at 63Hz, 160Hz, 400Hz, 1kHz, 2.5kHz, 6.25kHz, and 16kHz. Driven by 2 digital ports and 1 analog port, this filter board is easy to operate and comes with cables and audio plugs for convenience. 100% Satisfaction: Our customers are our top priority. If you encounter any problems with the product after receiving it, such as damages or incorrect quantity, please contact the seller immediately. We strive to provide you with satisfactory after-sales service. Item Type: Filter Board Material: PCB Working Voltage: 5V Drive Interface: 2 x digital port, 1 x analog port Principle: The audio processing of this board is based on the MSGEQ7 graphic equalization filter IC. It filters the audio signal into 7 frequency bands and outputs the amplitude of each band. The 7 frequency bands are 63Hz, 160Hz, 400Hz, 1kHz, 2.5kHz, 6.25kHz, and 16kHz. Package includes: - 1 x Filter Board - 1 x Cable - 1 x Audio Plug - 11 x Module Accessories - 1 x Wiring Diagram