You may use a audio splitter cable so that you can feed same music simultaneously into spectrum analyzer and into another amplifier ( if needed ). ADC is configured to use external reference voltage .
In this project, I use an Arduino UNO to record audio, that can be used for Speech Recognition purposes, with a MAX4466 Electret Microphone Amplifier. This is a fully assembled and tested board, that ...
An Arduino Due forms the heart of the project ... and a PAM8403 Class D audio amplifier for the built-in loudspeaker. The enclosure is made from PVC panels, and accented with colored adhesive ...
Instead, he drew up a simple schematic that used an Arduino Nano, an FM radio module based on the TEA5767, and an audio amplifier based on the LM386. A single button on the Arduino helps cycle ...