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5:19
YouTube
G6EJD - David
Tech Note 076 - ESP8266/ESP32 Audio Spectrum Analyser using FFT
In this project I use the Fast Fourier Transform algorithm to convert audio (in the time domain) back to its component frequency parts and then display the results as bands of amplitude and frequency on an OLED either 0.96" or 1.3". Choose the display you have by commenting out the library not required (Sh1106 for the 1.3" OLED and SSD1306 for ...
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Dec 15, 2017
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