ESP32_FFT_VU VS FastLED

This Scott Marley's esp32 spectrum analyzer got me going into esp32.

It is still bugged, however I've managed to pin it down to one single issue I believe. (thanks to major help.) The sampling rate from the analog input is extremely slow for some reason. It takes a whole 2 seconds to take 8k samples from the A0 pin for a FFT. The code that this is being copied off of online found here: https://github.com/s-marley/ESP32_FFT_VU/blob/master/ESP32_FFT_VU/ESP32_FFT_VU.ino runs 40k samples at 9.2uS even though the code I have for that section is a carbon copy.

Build this based on project from S-Marley on Github (https://github.com/s-marley/ESP32_FFT_VU). My fork is at https://github.com/christiansuryanto/ESP32_FFT_VU . Preview video on Youtube https://www.youtube.com/shorts/Jht9vsqAN1U

Scott Marley has done a great demo with sound reactive lights. The code is very close to what you want with multiple patterns accessed via a button. The code ishere

I'm currently making some mini VU meters on 8x8 and 16x16 matrixes (matrices?). I'd love to be abe to use my patterns from here https://www.youtube.com/watch?v=Mgh2WblO5_c. Code on GitHub here: https://github.com/s-marley/ESP32_FFT_VU/blob/master/ESP32_FFT_VU/ESP32_FFT_VU.ino

"https://github.com/s-marley/ESP32_FFT_VU"

I used the examples from here https://github.com/FastLED/FastLED/wiki/Multiple-Controller-Examples

Sweet. Then pretty much any arduino or other microcontroller would take care of what you need. The strips only take one output pin plus power and ground so just about everything will work for driving them. They act like a long shift register so the single pin is all that's needed to load the full strip with whatever patterns you want regardless of the length. You just have to tell it how many LEDs there are in total is all. Check out the FastLED library. You can learn more about it there and/or install the library in the IDE by pressing "ctrl shift I" for windows or "command shift I" for mac and search for it in the upper search area and install it right there. It comes with working examples too so all you would have to do is install the library, load one of the new example sketches that came with it, and probably edit the example to change the NUM_LEDS count to match what you're working with.