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Here comes a simple Graphic Equalizer showing 14 audio bands from 60Hz up to 16kHz. It consist of a PCB based on MSGEQ7 and ESP dev board. Since a MSGEQ7 chip recognizes 7 bands only and an ESP dev board gives us a chance to read a single analog input only, there was a trick used to make it working for 2x7 bands at the same time.
I am sure this trick could be used as an inspiration for another projects as well, the same way as the project could be extended to show different animations or further modified to a stereo input instances relative simply.”

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