The circuit is based on a dsPIC30F6012A, which is chosen for a feature set which matches the requirements of this project.
It computes the distribution of the audio signal energy to 20 specific frequency bands and displays it on a 20×20 LED display in real time. It digitizes and processes this audio signal using a DSP. It accepts an analog audio signal as input. The Digital, real-time Audio Spectrum analyzer circuit for audio devices can be connected to any audio device. This circuit aims to professionals or hobbyists who would like to embed it in an audio device or use it as a stand-alone unit.
A Digital, real-time Audio Frequency Spectrum analyzer circuit for audio devices is presented in this project. An audio spectrum analyzer is used for measurements in the audible frequency spectrum (from 0 to 20000 Hz) and can be a very powerful tool for keeping a studio well tuned. Spectrum analyzers are employed in most of the modern signal processing systems for measuring the distribution of signal energy in frequency.
