A key component in the Quadify music streamer project is the MCP23017 board, a versatile and powerful IO expander that plays a vital role in interfacing the system's controls. This board is the linchpin that connects the original Quad FM4 buttons and LEDs to the Raspberry Pi, enabling seamless integration and control within the Volumio environment. The MCP23017 extends the Pi’s GPIO capabilities, allowing for more inputs and outputs than the Raspberry Pi alone could handle. It manages the inputs from the tactile buttons and the outputs to the LEDs, ensuring a responsive and interactive user experience. This integration not only simplifies the wiring and setup but also offers a reliable and efficient way to manage the interactive elements of the Quadify streamer. By leveraging the MCP23017, we enhance the streamer’s functionality and maintain the aesthetic integrity of the original Quad FM4 design, bringing a harmonious blend of old and new technologies.