audio fft neomatrix

#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>

#define PIN 3

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(32, 8, PIN,
  NEO_MATRIX_BOTTOM     + NEO_MATRIX_LEFT +
  NEO_MATRIX_COLUMNS + NEO_MATRIX_ZIGZAG,
  NEO_GRB            + NEO_KHZ800);

const uint16_t colors[] = {
  matrix.Color(128, 0, 0),
  matrix.Color(255, 0, 0),
  matrix.Color(255, 128, 0),
  matrix.Color(255, 255, 0),
  matrix.Color(0, 255, 0),
  matrix.Color(0, 255, 128),
  matrix.Color(0, 128, 255),
  matrix.Color(0, 0, 255),
  };

#include <Audio.h>
#include <Bounce.h>
Bounce button0 = Bounce(0, 15);
Bounce button1 = Bounce(1, 15);  // 15 = 15 ms debounce time
Bounce button2 = Bounce(2, 15);



///////////////////////////////////
// copy the Design Tool code here
///////////////////////////////////

#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>

// GUItool: begin automatically generated code
AudioInputI2S            i2s2;           //xy=210,60
AudioPlayMemory          playMem1;       //xy=261,210
AudioSynthWaveform       waveform1;      //xy=284,269
AudioMixer4              mixer1;         //xy=450,196
AudioOutputI2S           i2s1;           //xy=669,145
AudioAnalyzeFFT1024      fft1024_1;      //xy=677,201
AudioConnection          patchCord1(i2s2, 0, mixer1, 0);
AudioConnection          patchCord2(i2s2, 1, mixer1, 1);
AudioConnection          patchCord3(playMem1, 0, mixer1, 2);
AudioConnection          patchCord4(waveform1, 0, mixer1, 3);
AudioConnection          patchCord5(mixer1, 0, i2s1, 0);
AudioConnection          patchCord6(mixer1, 0, i2s1, 1);
AudioConnection          patchCord7(mixer1, fft1024_1);
AudioControlSGTL5000     sgtl5000_1;     //xy=526,301
// GUItool: end automatically generated code


// Use these with the Teensy Audio Shield
#define SDCARD_CS_PIN    10
#define SDCARD_MOSI_PIN  7
#define SDCARD_SCK_PIN   14

// Use these with the Teensy 3.5 & 3.6 SD card
//#define SDCARD_CS_PIN    BUILTIN_SDCARD
//#define SDCARD_MOSI_PIN  11  // not actually used
//#define SDCARD_SCK_PIN   13  // not actually used

// Use these for the SD+Wiz820 or other adaptors
//#define SDCARD_CS_PIN    4
//#define SDCARD_MOSI_PIN  11
//#define SDCARD_SCK_PIN   13
const int myInput = AUDIO_INPUT_LINEIN;


void setup() {

  Serial.begin(57600);

  matrix.begin();
  matrix.setTextWrap(false);
  matrix.setBrightness(40);
  matrix.setTextColor(colors[0]);
  matrix.fillScreen(0);
  matrix.show();

  AudioMemory(12);
  sgtl5000_1.enable();
  sgtl5000_1.volume(0.5);
//  SPI.setMOSI(SDCARD_MOSI_PIN);
//  SPI.setSCK(SDCARD_SCK_PIN);
//  if (!(SD.begin(SDCARD_CS_PIN))) {
//    while (1) {
//      Serial.println("Unable to access the SD card");
//      delay(500);
//    }
//  }

// Enable audio in
  sgtl5000_1.enable();
  sgtl5000_1.inputSelect(myInput);
  sgtl5000_1.volume(1);

  mixer1.gain(0, 1.0);
  mixer1.gain(1, 1.0);
  mixer1.gain(2, 0.0);
  mixer1.gain(3, 0.0);
  // Uncomment one these to try other window functions
  // fft1024_1.windowFunction(NULL);
  // fft1024_1.windowFunction(AudioWindowBartlett1024);
  // fft1024_1.windowFunction(AudioWindowFlattop1024);
  delay(2000);
  //playSdWav1.play("SDTEST2.WAV");

}

void loop() {

  if (fft1024_1.available()) {

    spectrum(0,fft1024_1.read(0,1));
    spectrum(1,fft1024_1.read(1,15));
    spectrum(2,fft1024_1.read(16,31));
    spectrum(3,fft1024_1.read(32,47));
    spectrum(4,fft1024_1.read(48,63));
    spectrum(5,fft1024_1.read(64,79));
    spectrum(6,fft1024_1.read(80,95));
    spectrum(7,fft1024_1.read(96,111));
    spectrum(8,fft1024_1.read(112,127));
    spectrum(9,fft1024_1.read(128,143));
    spectrum(10,fft1024_1.read(144,159));
    spectrum(11,fft1024_1.read(160,175));
    spectrum(12,fft1024_1.read(176,191));
    spectrum(13,fft1024_1.read(192,207));
    spectrum(14,fft1024_1.read(208,223));
    spectrum(15,fft1024_1.read(224,239));
    spectrum(16,fft1024_1.read(240,255));
    spectrum(17,fft1024_1.read(256,271));
    spectrum(18,fft1024_1.read(272,287));
    spectrum(19,fft1024_1.read(288,303));
    spectrum(20,fft1024_1.read(304,319));
    spectrum(21,fft1024_1.read(320,335));
    spectrum(22,fft1024_1.read(336,351));
    spectrum(23,fft1024_1.read(352,367));
    spectrum(24,fft1024_1.read(368,383));
    spectrum(25,fft1024_1.read(384,399));
    spectrum(26,fft1024_1.read(400,415));
    spectrum(27,fft1024_1.read(416,432));
    spectrum(28,fft1024_1.read(433,447));
    spectrum(29,fft1024_1.read(448,463));
    spectrum(30,fft1024_1.read(464,479));
    spectrum(31,fft1024_1.read(480,4511));

    matrix.show();
  }

    matrix.fillScreen(0);
    delay(10);
    matrix.show();

}


void spectrum(int x, float n) {

// x = band
// y = led height

    int y = LEDnumber(n);

    matrix.drawPixel(x,y,colors[y]);

//    Serial.print(band);
//    Serial.print(" ");
//    Serial.print(LEDnumber(n));
//    Serial.println();
}

int LEDnumber(float n) {
  int led = 0;
  if (n > 0.250) {
    led = 8;
  } else if ( n > 0.220) {
    led = 7;
  } else if ( n > 0.180) {
    led = 6;
  } else if ( n > 0.100) {
    led = 5;
  } else if ( n > 0.060) {
    led = 4;
  } else if ( n > 0.030) {
    led = 3;
  } else if ( n > 0.010) {
    led = 2;
  } else if ( n > 0.008) {
    led = 1;
  } else if ( n < 0.009) {
    led = 0;
  }

  return led;
}

//void printNumber(float n) {
//
//  if (n > 0.25) {
//    Serial.print("##### ");
//  } else if (n > 0.18) {
//    Serial.print(".###. ");
//  } else if (n > 0.06) {
//    Serial.print("..#.. ");
//  } else if (n > 0.005) {
//    Serial.print("..*.. ");
//  } else if ( n < 0.005) {
//    Serial.print("..... ");
//  }
//
//}