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s-marley / ESP32_FFT_VU

A spectrum analyzer VU meter for the ESP32 and a FastLED matrix
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ADC could not read most the FFT frequency #13

Open stanleyseow opened 2 years ago

stanleyseow commented 2 years ago

Firstly, great spectrum analyzer project !!!!

I did a circuit with the 2 x 10K and 2 x 100K to bais the voltage to 1.6V Image here https://flic.kr/p/2ndwoTo

When I ran the freq sweep, I could not get all the freq, only a few freq responded like 4KHz to 10KHz , not the entire spectrum ...

Is it bcos my input is headphone out instead of line-out ?? I tried to max out the headphone volume, same results..

Any pointers on how to troubleshoot this ?

Thanks

My setup : https://my.cytron.io/p-nodemcu-esp32 WS2812 8x32

I have done something similar for the Teensy 3.2 + Audio Board but this one would be a lower cost alternatives ...