Opamp and cmos integrated circuits based on sound level indicator audio spectrum analyzer circuit led bar display used 10 pieces for a little advanced version of the classic spectrum analyzer, VU meter circuit circuit circuit diagram a bit complicated but it is written makes it easy for you to work more or less pcb drawings
Audio Spectrum Analyzer Project
The audio spectrum analyzer was made and operated stably, meets requirements for professional audio spectrum analyzer. However, display is not showed the sense of beauty because using LEDs, if we use LCD display matrix, it will make better result.
If we combine the audio spectrumanalyzer with a tone equalizers, we will have a Graphic Equalizer. This equipment is used commonly in medium rank to high rank audio systems. The combination of the two circuits is also the development for this project and finally the author hopes this is a useful document for who interesting in this project.