apa102

#include <FastLED.h>
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>

#define NUM_LEDS 300
#define DATA_PIN 7
#define CLOCK_PIN 14

CRGB leds[NUM_LEDS];

AudioInputI2S            audioInput;
AudioOutputI2S           audioOutput;
AudioAnalyzeFFT1024 fftL;
AudioAnalyzeFFT1024 fftR;
AudioConnection          patchCord1(audioInput, 0, audioOutput, 0);
AudioConnection          patchCord2(audioInput, 1, audioOutput, 1);
AudioConnection patchCord3(audioInput, 0, fftL, 0);
AudioConnection patchCord4(audioInput, 1, fftR, 0);
AudioControlSGTL5000     sgtl5000;

void setup() {
  FastLED.addLeds<APA102, DATA_PIN, CLOCK_PIN, BRG>(leds, NUM_LEDS);

  AudioMemory(20);

  sgtl5000.enable();
  sgtl5000.inputSelect(AUDIO_INPUT_LINEIN);
  sgtl5000.volume(0.5);

  fill_solid(leds, NUM_LEDS, CRGB::Black);
  FastLED.show();
}

int i = 0;

void loop() { 
  EVERY_N_MILLISECONDS(50)
  {
    i++;
    fill_solid(leds, NUM_LEDS, CHSV(i, 255, 255));
    FastLED.show();
  }
}