#include <SD.h>               // need to include the SD library
#define SD_ChipSelectPin 10   //pin10 for Arduino Pro Mini
#include <TMRpcm.h>           //  Lib to play wav file
#include <SPI.h>

TMRpcm tmrpcm;   // create an object for use in this sketch

unsigned long time = 0;
int waveform = 0;
int qtyLED = 0;
int timeLED = 25;

void setup(){
  tmrpcm.speakerPin = 9; //pin 9 for Aduino Pro Mini
  Serial.begin(9600);
  pinMode(17,OUTPUT);
  pinMode(16,OUTPUT);
  pinMode(15,OUTPUT);
  pinMode(14,OUTPUT);
  if (!SD.begin(SD_ChipSelectPin)) {  // see if the card is present and can be initialized:
    Serial.println("SD fail");  
    return;   // don't do anything more if not
  }
  else{   
    Serial.println("SD ok");   
  }
  tmrpcm.play("music.wav"); //the sound file "music" will play each time the arduino powers up, or is reset
  tmrpcm.volume(2);
}

void loop(){
  waveform = OCR1A; //read TIMER1 value, represent for wave form music
  waveform = waveform - 256;  // middle point of volume(2) is 256
  qtyLED = waveform/16;  //q'ty LED need to be ON
  if (qtyLED <= 0){
    qtyLED0();
    delay(timeLED);
  }
  if (qtyLED == 1){
    qtyLED0();
    delay(timeLED);
    qtyLED1();
    delay(timeLED);
  }
  if (qtyLED == 2){
    qtyLED0();
    delay(timeLED);
    qtyLED1();
    delay(timeLED);
    qtyLED2();
    delay(timeLED);
  }
  if (qtyLED == 3){
    qtyLED0();
    delay(timeLED);
    qtyLED1();
    delay(timeLED);
    qtyLED2();
    delay(timeLED);
    qtyLED3();
    delay(timeLED);
  }
  if (qtyLED == 4){
    qtyLED0();
    delay(timeLED);
    qtyLED1();
    delay(timeLED);
    qtyLED2();
    delay(timeLED);
    qtyLED3();
    delay(timeLED);
    qtyLED4();
    delay(timeLED);
  }

  if(Serial.available()){    
    switch(Serial.read()){
    case 'd': tmrpcm.play("music.wav"); break;
    case 'b': tmrpcm.play("BeatIt.wav"); break;
    case 'r': tmrpcm.play("Race_Car.wav"); break;
    case 'p': tmrpcm.pause(); break;
    case '?': if(tmrpcm.isPlaying()){ Serial.println("A wav file is being played");} break;
    case 'S': tmrpcm.stopPlayback(); break;
    case '=': tmrpcm.volume(1); break;
    case '-': tmrpcm.volume(0); break;
    case '0': tmrpcm.quality(0); break;
    case '1': tmrpcm.quality(1); break;
    default: break;
    }
  }
}

void qtyLED1(){
  digitalWrite(17,0);
  digitalWrite(16,0);
  digitalWrite(15,0);
  digitalWrite(14,1);
}
void qtyLED2(){
  digitalWrite(17,0);
  digitalWrite(16,0);
  digitalWrite(15,1);
  digitalWrite(14,1);
}
void qtyLED3(){
  digitalWrite(17,0);
  digitalWrite(16,1);
  digitalWrite(15,1);
  digitalWrite(14,1);
}
void qtyLED4(){
  digitalWrite(17,1);
  digitalWrite(16,1);
  digitalWrite(15,1);
  digitalWrite(14,1);
}
void qtyLED0(){
  digitalWrite(17,0);
  digitalWrite(16,0);
  digitalWrite(15,0);
  digitalWrite(14,0);
}