byte commandLength;
byte command[19];
byte sndCmd[4];
int DataFldr = 33;//7 Segment Folder Display
int LatchFldr = 34;//7 Segment Folder Display
int ClockFldr = 35;//7 Segment Folder Display
int DataTrk = 36;//7 Segment Track Display
int LatchTrk = 37;//7 Segment Track Display
int ClockTrk = 38;//7 Segment Track Display
int DataSpkr = 39;//Spkr Relays
int LatchSpkr = 40;//Spkr Relays
int ClockSpkr = 41;//Spkr Relays
int DataLgt = 42;//Light Transistors & Relays
int LatchLgt = 43;//Light Transistors & Relays
int ClockLgt = 44;//Light Transistors & Relays
int fldrDigit1;
int fldrDigit2;
int trkDigit1;
int trkDigit2;
int busyPin1 = 49;//receives busy signal from DY-SV5W board 1
int busyLed1 = 48;
int busyPinState1;
int busyPin2 = 51;//receives busy signal from DY-SV5W board 2
int busyLed2 = 50;
int busyPinState2;
int busyPin3 = 53;//receives busy signal from DY-SV5W board 3
int busyLed3 = 52;
int busyPinState3;
int lgtAll = 45;//***********************************************************************************************************************************************************************************************
int lgtState;
int dblSound = 46;//***********************************************************************************************************************************************************************************************
int dblState;
int pinBtn [23] = {13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32};//Arduino Pin #s for buttons
int valNum [23] = {"V1", "V2", "V3", "V4", "V5", "V6", "V7", "V8", "V9", "V10", "V11", "V12", "V13", "V14", "V15", "V16", "V17", "V18", "V19", "V20", "V21", "V22", "V23"};//Container for Pin status (HIGH or LOW)
int checkSum;
int sndFldr;
int randNumb1;
int Vol = 22;//Initial Volume setting from 1 - 30

int disp [11][8] = {
  {1,1,1,1,1,1,0,0},//0 - Write 7 segment positions A, B, C, D, E, F = HIGH(1) and positions G = LOW(0) and DP Pin not used for project
  {0,1,1,0,0,0,0,0},//1
  {1,1,0,1,1,0,1,0},//2
  {1,1,1,1,0,0,1,0},//3
  {0,1,1,0,0,1,1,0},//4
  {1,0,1,1,0,1,1,0},//5
  {1,0,1,1,1,1,1,0},//6
  {1,1,1,0,0,0,0,0},//7
  {1,1,1,1,1,1,1,0},//8
  {1,1,1,1,0,1,1,0},//9
  {0,0,0,0,0,0,0,0}//Blank - No segments illuminated
};

int spkrNumGrpA [17][16] = {
  {1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1},//Write spkr realay 1 = LOW(0: ON) and all other relays = HIGH(1: OFF)
  {1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1},//2
  {1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1},//3
  {1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1},//4
  {1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1},//5
  {1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1},//6
  {1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1},//7
  {0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},//8
  {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0},//9
  {1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1},//10
  {1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1},//11
  {1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1},//12
  {1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1},//13
  {1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1},//14
  {1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1},//15
  {1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1},//16
  {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}//Blank - No spkr relays on
};
int spkrNumGrpB [17][16] = {
  {1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1},//Write spkr realay 1 = LOW(0: ON) and all other relays = HIGH(1: OFF)
  {1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1},//2
  {1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1},//3
  {1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1},//4
  {1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1},//5
  {1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1},//6
  {1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1},//7
  {0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},//8
  {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0},//9
  {1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1},//10
  {1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1},//11
  {1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1},//12
  {1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1},//13
  {1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1},//14
  {1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1},//15
  {1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1},//16
  {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}//Blank - No spkr relays on
};

//0 = Grinch Lair
  //1 = Cabin
  //2 = Cabin Smoke
  //3 = Campfire
  //4 = Campfire Smoke
  //5 = Gazebo
  //6 = House #4
  //7 = Home Alone House
  //8 = House #2
  //9 = Church
  //10 = Bell Tower
  //11 = Train Station
  //12 = Polar Express House
  //13 = Hotel
  //14 = Restaurant
  //15 = Pub
  //16 = Toy Store
  //17 = Pet Shop
  //18 = Theater
  //19 = Flower Shop
  //20 = School
  //21 = Town Hall
  //22 = Fire Station
  //23 = Clock Store
  //24 = Bank
  //25 = Bakery
  //26 = Antique Store
  //27 = Coffee Shop
  //28 = Gift Store
  //29 = Christmas Tree
  //30 = Lamp Post Set - Gift Store
  //31 = Lamp Post Set - Antique Store
  //32 = Lamp Post Set - Bank
  //33 = Lamp Post Set - Fire Station
  //34 = Lamp Post Set - Train Station
  //35 = Lamp Post Set - School
  //36 = Lamp Post Set - Theater
  //37 = Lamp Post Set - Toy Store
  //38 = Lamp Post Set - Restaurant
  //39 = North Pole Village Bldg1
  //40 = North Pole Village Bldg2
  //41 = North Pole Village Bldg3
  //42 = North Pole Village Bldg4
  //43 = North Pole Village Bldg5
  //44 = Santa Sleigh
  //45 = Ice Skaters

int lgtNum [19][48] = {
//{0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//Write ALL Light realays OFF 0 = LOW
  {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},//Write ALL Light realays ON 1 = HIGH
  {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//2: Grinch
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//3: Scrooge
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//4: Elf
  {0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//5: Home Alone
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//6: North Pole
  {0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//7: Carolers
  {0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//8: Carolers & Christmas Tree
  {0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//9: Church
  {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//10: Town Center
  {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0},//11: Town Center Lamp Posts
  {0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//12: Campfire
  {0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//13: Campfire Smoke
  {0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0},//14: Ice Skating Pond
  {0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//15: Cabin
  {0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//16: Cabin Smoke
  {0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//17: Bell Tower
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0}//18: Elf & Santa
};

// 3rd Board - ability to play 2 sounds at once
// Rec sequence and Playback - 2 memory positions
// Sleep mode if no input for x amount of time

void sendCommand(int z){
  if (z == 5){
    for(int i=0; i<commandLength; i++){
      Serial1.write(command[i]);//Write to 2nd DY-SV5W Board
    }
  } else {
    for(int i=0; i<commandLength; i++){
      Serial2.write(command[i]);//Write to 1st DY-SV5W Board
    }
  }
}
void Stop(){//Stop playing track
  command[0] = 0xAA;// = 170
  command[1] = 0x04;// = 4 in decimal
  command[2] = 0x00;// = 0
  command[3] = 0xAE;// = 174
  commandLength = 4;
  sendCommand(1);
  sendCommand(5);
}

void upVol(){//Adjust Volume Up
  command[0] = 0xAA;// = 170
  command[1] = 0x14;// = 20 in decimal
  command[2] = 0x00;// = 0
  command[3] = 0xBE;// = 190
  commandLength = 4;
  sendCommand(1);
  sendCommand(5);
}

void dwnVol(){//Adjust Volume Down
  command[0] = 0xAA;// = 170
  command[1] = 0x15;// = 21 in decimal
  command[2] = 0x00;// = 0
  command[3] = 0xBF;// = 191
  commandLength = 4;
  sendCommand(1);
  sendCommand(5);
}

void setVol(){
  command[0] = 170;//= 0xAA in Hex
  command[1] = 0x13;//= 19 in decimal
  command[2] = 1;
  command[3] = Vol;
  command[4] = (command[0] + command[1] + command[2] + command[3]);
  commandLength = 5;
  sendCommand(1);
  sendCommand(5);
}

void clrLght(){
  for (int i=0; i<48; i++){
    digitalWrite(DataLgt, lgtNum[0][i]);
    digitalWrite(ClockLgt, HIGH);
    digitalWrite(ClockLgt, LOW);
  }
  digitalWrite(LatchLgt, HIGH);
  digitalWrite(LatchLgt, LOW);
}

void lgtSw(int q){
  clrLght();

  for (int i=0; i<48; i++){
    digitalWrite(DataLgt, lgtNum[q][i]);
    digitalWrite(ClockLgt, HIGH);
    digitalWrite(ClockLgt, LOW);
  }
  digitalWrite(LatchLgt, HIGH);
  digitalWrite(LatchLgt, LOW);
}

void Campfire(){
  clrLght();
 
  for (int j=0; j<50; j++){
    randNumb1 = (rand() % 10);
    for (int i=0; i<48; i++){
      digitalWrite(DataLgt, lgtNum[12][i]);
      digitalWrite(ClockLgt, HIGH);
      digitalWrite(ClockLgt, LOW);
    }
    digitalWrite(LatchLgt, HIGH);
    digitalWrite(LatchLgt, LOW);
    delay(randNumb1*150);
    for (int i=0; i<48; i++){
      digitalWrite(DataLgt, lgtNum[13][i]);
      digitalWrite(ClockLgt, HIGH);
      digitalWrite(ClockLgt, LOW);
    }
    digitalWrite(LatchLgt, HIGH);
    digitalWrite(LatchLgt, LOW);
  }
}

void Cabin(){
  clrLght();
 
  for (int j=0; j<50; j++){
    randNumb1 = (rand() % 10);
    for (int i=0; i<48; i++){
      digitalWrite(DataLgt, lgtNum[15][i]);
      digitalWrite(ClockLgt, HIGH);
      digitalWrite(ClockLgt, LOW);
    }
    digitalWrite(LatchLgt, HIGH);
    digitalWrite(LatchLgt, LOW);
    delay(randNumb1*150);
    for (int i=0; i<48; i++){
      digitalWrite(DataLgt, lgtNum[16][i]);
      digitalWrite(ClockLgt, HIGH);
      digitalWrite(ClockLgt, LOW);
    }
    digitalWrite(LatchLgt, HIGH);
    digitalWrite(LatchLgt, LOW);
  }
}

void lgtBlnk(){
  clrLght();

  for (int j=0; j<50; j++){
    for (int i=0; i<48; i++){
      digitalWrite(DataLgt, lgtNum[10][i]);
      digitalWrite(ClockLgt, HIGH);
      digitalWrite(ClockLgt, LOW);
    }
    digitalWrite(LatchLgt, HIGH);
    digitalWrite(LatchLgt, LOW);
    delay(500);
    for (int i=0; i<48; i++){
      digitalWrite(DataLgt, lgtNum[11][i]);
      digitalWrite(ClockLgt, HIGH);
      digitalWrite(ClockLgt, LOW);
    }
    digitalWrite(LatchLgt, HIGH);
    digitalWrite(LatchLgt, LOW);
  }
}

void clrTrk(){
  for (int i=0; i<2; i++){//Set both Track digits blank
    for (int j=0; j<8; j++){
      digitalWrite(DataTrk, disp[10][j]);
      digitalWrite(ClockTrk, HIGH);
      digitalWrite(ClockTrk, LOW);
    }
  }
  digitalWrite(LatchTrk, HIGH);
  digitalWrite(LatchTrk, LOW);
}

void trkPlay(int fldrNum, int trkNum, int lgtCond){
  clrTrk();

  if (trkNum == 20){
    command[11] = 0x30;// 0
    command[12] = 0x32;// 2
    command[13] = 28+trkNum;//0 = 0x30 = 48 to 9 = 0x39 = 57
  }else if (trkNum < 10){
    command[11] = 0x30;// 0
    command[12] = 0x30;// 0
    command[13] = 48+trkNum;//1 = 0x31 = 49 to 9 = 0x39 = 57
  }else{
    command[11] = 0x30;// 0
    command[12] = 0x31;// 1
    command[13] = 38+trkNum;//0 = 0x30 = 48 to 9 = 0x39 = 57
  }

  int tmp2 = trkNum;
  trkDigit2 = trkNum%10;//2nd digit of "trkNum"
  trkDigit1 = trkNum /= 10;//1st digit of "trkNum"

  if (tmp2<10){
    for (int i=0; i<8; i++){
      digitalWrite(DataTrk, disp[tmp2][i]);//Turn on selected 7 segments for 2nd digit
      digitalWrite(ClockTrk, HIGH);
      digitalWrite(ClockTrk, LOW);
    }
    for (int i=0; i<8; i++){
      digitalWrite(DataTrk, disp[10][i]);//Turn all 7 segments off for 1st digit
      digitalWrite(ClockTrk, HIGH);
      digitalWrite(ClockTrk, LOW);
    }
  }else {
    for (int i=0; i<8; i++){
      digitalWrite(DataTrk, disp[trkDigit2][i]);//Turn on selected 7 segments for 2nd digit
      digitalWrite(ClockTrk, HIGH);
      digitalWrite(ClockTrk, LOW);
    }
    for (int i=0; i<8; i++){
      digitalWrite(DataTrk, disp[trkDigit1][i]);//Turn on selected 7 segments for 1st digit
      digitalWrite(ClockTrk, HIGH);
      digitalWrite(ClockTrk, LOW);
    }
  }
  digitalWrite(LatchTrk, HIGH);
  digitalWrite(LatchTrk, LOW);

  command[0] = 0xAA;// 170
  command[1] = 0x08;// 8
  command[2] = 0x0F;// 15
  command[3] = 0x01;// 1 SD CARD
  command[4] = 0x2F;// / = 47

  if (fldrNum == 1){
    command[5] = 71;// G = 71 = 0x47   Grinch
    command[6] = 82;// R = 82 = 0x52
    if (lgtCond == 1){
      lgtSw(1);
    }else{
      lgtSw(2);
    }
  } else if (fldrNum == 2){
    command[5] = 0x53;// S = 83    Scrooge
    command[6] = 0x47;// G = 71
    if (lgtCond == 1){
      lgtSw(1);
    }else{
      lgtSw(3);
    }
  } else if (fldrNum == 3){
    command[5] = 0x45;// E = 69    Elf
    command[6] = 0x46;// F = 70
    if (lgtCond == 1){
      lgtSw(1);
    }else{
      if (tmp2 == 2){
        lgtSw(18);
      }else{
        lgtSw(4);
      }
    }
  } else if (fldrNum == 4){
    command[5] = 0x48;// H = 72    Home Alone
    command[6] = 0x41;// A = 65
    if (lgtCond == 1){
      lgtSw(1);
    }else{
      lgtSw(5);
    }
  } else if (fldrNum == 5){
    command[5] = 0x48;// H = 72    Polar Express Hobo
    command[6] = 0x42;// B = 66
    if (lgtCond == 1){
      lgtSw(1);
    }
  } else if (fldrNum == 6){
    command[5] = 0x42;// B = 66    Blizzard
    command[6] = 0x4C;// L = 76
    if (lgtCond == 1){
      lgtSw(1);
    }
  } else if (fldrNum == 7){
    command[5] = 0x46;// F = 70    Forest
    command[6] = 0x54;// T = 84
    if (lgtCond == 1){
      lgtSw(1);
    }
  } else if (fldrNum == 8){
    command[5] = 0x4E;// N = 78    North Pole
    command[6] = 0x50;// P = 80
    if (lgtCond == 1){
      lgtSw(1);
    }else{
      lgtSw(6);
    }
  } else if (fldrNum == 9){
    command[5] = 0x43;// C = 67    Carolers
    command[6] = 0x52;// R = 82
    if (lgtCond == 1){
      lgtSw(1);
    }else{
      if (tmp2 == 1){
        lgtSw(8);
      }else{
        lgtSw(7);
      }
    }
  } else if (fldrNum == 10){
    command[5] = 0x43;// C = 67    Church
    command[6] = 0x48;// H = 72
    if (lgtCond == 1){
      lgtSw(1);
    }else{
      lgtSw(9);
    }
  } else if (fldrNum == 11){
    command[5] = 0x54;// T = 84    Town Center
    command[6] = 0x43;// C = 67
    if (lgtCond == 1){
      lgtSw(1);
    }else{
      if (tmp2 == 5){
        lgtBlnk();
      }else{
        lgtSw(11);
      }
    }
  } else if (fldrNum == 12){
    command[5] = 0x46;// F = 70    Campfire
    command[6] = 0x52;// R = 82
    if (lgtCond == 1){
      lgtSw(1);
    }else{
      Campfire();
    }
  } else if (fldrNum == 13){
    command[5] = 0x49;// I = 73    Ice Skating
    command[6] = 0x53;// S = 83
    if (lgtCond == 1){
      lgtSw(1);
    }else{
      lgtSw(14);
    }
  } else if (fldrNum == 14){
    command[5] = 0x42;// B = 66    Bell Tower
    command[6] = 0x54;// T = 84
    if (lgtCond == 1){
      lgtSw(1);
    }else{
      lgtSw(17);
    }
  }

  command[7] = 0x2A;// * = 42
  command[8] = 0x2F;// / = 47
  command[9] = 0x30;// 0 = 48
  command[10] = 0x30;// 0 = 48
  command[14] = 0x2A;// * = 42
  command[15] = 0x4D;// M = 77
  command[16] = 0x50;// P = 80
  command[17] = 0x33;// 3 = 51
  checkSum = 0;
        for (int i=0; i<18; i++) {
           checkSum +=  command[i];
        }
  command[18] = lowByte(checkSum);//SM check bit... low bit of the sum of all previous values
  commandLength = 19;
  sendCommand(fldrNum);
}

void clrDir(){
  for (int i=0; i<16; i++){
    digitalWrite(DataSpkr, spkrNumGrpA[16][i]);//Turn all speaker relays off
    digitalWrite(ClockSpkr, HIGH);
    digitalWrite(ClockSpkr, LOW);
  }
  digitalWrite(LatchSpkr, HIGH);
  digitalWrite(LatchSpkr, LOW);
}

void dirSw(int x){
  for (int i=0; i<2; i++){//Set both Folder digits blank
    for (int j=0; j<8; j++){
      digitalWrite(DataFldr, disp[10][j]);
      digitalWrite(ClockFldr, HIGH);
      digitalWrite(ClockFldr, LOW);
    }
  }

  digitalWrite(LatchFldr, HIGH);
  digitalWrite(LatchFldr, LOW);

  int tmp = x;
  fldrDigit2 = x%10;//2nd digit of "x"
  fldrDigit1 = x /= 10;//1st digit of "x"

  if (tmp<10){
    for (int i=0; i<8; i++){
      digitalWrite(DataFldr, disp[tmp][i]);//Turn on selected 7 segments for 2nd digit
      digitalWrite(ClockFldr, HIGH);
      digitalWrite(ClockFldr, LOW);
    }
    for (int i=0; i<8; i++){
      digitalWrite(DataFldr, disp[10][i]);//Turn all 7 segments off for 1st digit
      digitalWrite(ClockFldr, HIGH);
      digitalWrite(ClockFldr, LOW);
    }
  }else {
    for (int i=0; i<8; i++){
      digitalWrite(DataFldr, disp[fldrDigit2][i]);//Turn on selected 7 segments for 2nd digit
      digitalWrite(ClockFldr, HIGH);
      digitalWrite(ClockFldr, LOW);
    }
    for (int i=0; i<8; i++){
      digitalWrite(DataFldr, disp[fldrDigit1][i]);//Turn on selected 7 segments for 1st digit
      digitalWrite(ClockFldr, HIGH);
      digitalWrite(ClockFldr, LOW);
    }
  }
  digitalWrite(LatchFldr, HIGH);
  digitalWrite(LatchFldr, LOW);

  clrDir();
  Stop();

  if (tmp == 5 || tmp>16){
    clrDir();
  }else if (tmp<5){
    for (int i=0; i<16; i++){//For Relays 1-4 *****************************************************************************
      digitalWrite(DataSpkr, spkrNumGrpA[tmp-1][i]);//Turn selected speaker relay on
      digitalWrite(ClockSpkr, HIGH);
      digitalWrite(ClockSpkr, LOW);
    }
    digitalWrite(LatchSpkr, HIGH);
    digitalWrite(LatchSpkr, LOW);
  }else {
    for (int i=0; i<16; i++){//For Relays 5-16 *****************************************************************************
      digitalWrite(DataSpkr, spkrNumGrpA[tmp-2][i]);//Turn selected speaker relay on
      digitalWrite(ClockSpkr, HIGH);
      digitalWrite(ClockSpkr, LOW);
    }
    digitalWrite(LatchSpkr, HIGH);
    digitalWrite(LatchSpkr, LOW);
  }
}

void setup() {
  Serial.begin(115200);
  Serial1.begin(9600);
  Serial2.begin(9600);
  Serial3.begin(9600);
  delay(250);

  for (int i=0; i<23; i++){
    pinMode(pinBtn[i], INPUT);
  }

  pinMode(busyPin1, INPUT);
  pinMode(busyPin2, INPUT);
  pinMode(busyPin3, INPUT);
  pinMode(lgtAll, INPUT);
  pinMode(dblSound, INPUT);
  pinMode(busyLed1, OUTPUT);
  pinMode(busyLed2, OUTPUT);
  pinMode(busyLed3, OUTPUT);
  pinMode(DataFldr, OUTPUT);
  pinMode(LatchFldr, OUTPUT);
  pinMode(ClockFldr, OUTPUT);
  pinMode(DataTrk, OUTPUT);
  pinMode(LatchTrk, OUTPUT);
  pinMode(ClockTrk, OUTPUT);
  pinMode(DataSpkr, OUTPUT);
  pinMode(LatchSpkr, OUTPUT);
  pinMode(ClockSpkr, OUTPUT);
  pinMode(DataLgt, OUTPUT);
  pinMode(LatchLgt, OUTPUT);
  pinMode(ClockLgt, OUTPUT);
  digitalWrite(busyLed1, LOW);
  digitalWrite(busyLed2, LOW);
  digitalWrite(busyLed3, LOW);
  clrDir();
  clrLght();
  setVol();
}

void loop() {
  busyPinState1 = digitalRead(busyPin1);
  busyPinState2 = digitalRead(busyPin2);
  busyPinState3 = digitalRead(busyPin3);
  lgtState = digitalRead(lgtAll);
  dblState = digitalRead(dblSound);

  for (int i=0; i<23; i++){
    valNum[i] = digitalRead(pinBtn[i]);
  }

  if (busyPinState1 > 0) { //nothing playing on Board 1
    digitalWrite(busyLed1, LOW);
  } else {
    digitalWrite(busyLed1, HIGH);
  }
  if (busyPinState2 > 0) { //nothing playing on Board 2
    digitalWrite(busyLed2, LOW);
  } else {
    digitalWrite(busyLed2, HIGH);
  }
  if (busyPinState3 > 0) { //nothing playing on Board 3
    digitalWrite(busyLed3, LOW);
  } else {
    digitalWrite(busyLed3, HIGH);
  }

  if (valNum[21] == HIGH){
    delay(250);
    upVol();
  }
  if (valNum[22] == HIGH){
    delay(250);
    dwnVol();
  }

  if(dblState == HIGH && busyPinState3 == HIGH){
    
  }

  if (valNum[0] == HIGH){
    for (int j=1; j<21; j++){
      if (valNum[j] == HIGH){
        sndFldr = j;
        delay(250);
        clrTrk();
        dirSw(j);
      }
    }
  }else{
    if (valNum[1] == HIGH || valNum[2] == HIGH || valNum[3] == HIGH || valNum[4] == HIGH || valNum[5] == HIGH || valNum[6] == HIGH || valNum[7] == HIGH || valNum[8] == HIGH || valNum[9] == HIGH || valNum[10] == HIGH || valNum[11] == HIGH || valNum[12] == HIGH || valNum[13] == HIGH || valNum[14] == HIGH || valNum[15] == HIGH || valNum[16] == HIGH || valNum[17] == HIGH || valNum[18] == HIGH || valNum[19] == HIGH || valNum[20] == HIGH){
      for (int k=1; k<21; k++){// for tracks 1 - 20
        if (valNum[k] == HIGH){
          delay(250);
          trkPlay(sndFldr,k,lgtState);
        }
      }
    }
  }
}