noise_audio2

gistfile1.txt

// as showed on youtube
void noise_audio2() {
  read_audio();
  CRGBPalette16 Pal( pit3 ); // the red one
  y[0] += (bands[4] - 10) * 4;
  scale_x[0] = 10000 - (bands[0] * 40);
  scale_y[0] = scale_x[0];
  byte layer = 0;
  for (uint8_t i = 0; i < Width; i++) {
    uint32_t ioffset = scale_x[layer] * (i - CentreX);
    for (uint8_t j = 0; j < Height; j++) {
      uint32_t joffset = scale_y[layer] * (j - CentreY);
      uint16_t data = inoise16(x[layer] + ioffset, y[layer] + joffset, z[layer]);
      // results in the range of 11k - 51k
      // limit results:
      if (data < 11000) data = 11000;
      if (data > 51000) data = 51000;
      // normalize data to a range of 0 - 40000
      data = data - 11000;
      // scale down
      data = data / 161;
      noise[layer][i][j] = data;
    }
  }
  // map 1st layer
  for (uint8_t y = 0; y < Height; y++) {
    for (uint8_t x = 0; x < Width; x++) {
      leds[XY(x, y)] = ColorFromPalette( Pal, (millis() / 130) + noise[0][x][y]);
    }
  }

  //2nd layer
  CRGBPalette16 Pal2( pit4 ); // the blue one
  y[1] -= (bands[7] - 10) * 4;
  //z[1] += 9;
  scale_x[1] = 10000 - (bands[1] * 40);
  scale_y[1] = scale_x[1];
  layer = 1;
  for (uint8_t i = 0; i < Width; i++) {
    uint32_t ioffset = scale_x[layer] * (i - CentreX);
    for (uint8_t j = 0; j < Height; j++) {
      uint32_t joffset = scale_y[layer] * (j - CentreY);
      uint16_t data = inoise16(x[layer] + ioffset, y[layer] + joffset, z[layer]);
      // results in the range of 11k - 51k
      // limit results:
      if (data < 11000) data = 11000;
      if (data > 51000) data = 51000;
      // normalize data to a range of 0 - 40000
      data = data - 11000;
      // scale down
      data = data / 161;
      noise[layer][i][j] = data;
    }
  }
  for (uint8_t y = 0; y < Height; y++) {
    for (uint8_t x = 0; x < Width; x++) {
      // map 2nd layer
      buffer[XY(x, y)] = ColorFromPalette( Pal2, (bands[0] / 4) + noise[1][x][y]);
      // add both layers
      leds[XY(x, y)] = buffer[XY(x, y)] + leds[XY(x, y)];
    }
  }
  adjust_gamma();
  FastLED.show();
}