Item Type: Filter Board_x000D_ Material: PCB_x000D_ Working Voltage: 5V_x000D_ Drive Interface: 2 x digital port, 1 x analog port_x000D_ Principle: Audio processing is an audio signal analysis IC based on MSGEQ7 graphic equalization filter. The audio signal will be filtered into 7 frequency bands through this module, and can output the amplitude of each frequency band. The 7 frequency bands are 63Hz, 160Hz, 400Hz, 1kHz, 2.5kHz, 6.25kHz and 16kHz. 1The filter board can be used to create an audio analyzer to track the frequency information of music so that your controller can interact with the music. 2Used to capture the music spectrum, make music interactive robots, process audio data reading, make lighting special effects, voice analysis, etc. 3The typical amplitude of the input signal is required to be 20dB, and a potentiometer that can adjust the input amplitude is provided. 4The audio signal will be filtered into 7 frequency bands through this module, namely 63Hz, 160Hz, 400Hz, 1kHz, 2.5kHz, 6.25kHz and 16kHz. 5The filter board is driven by 2 digital ports and 1 analog port, and is equipped with cables and audio plugs for easy operation.Please use within the parameter voltage range. 1 x Filter Board 1 x Cable 1 x Audio Plug 11 x Module Accessories 1 x Wiring Diagram