Sound Controller - Arduino

//References
//Basic Example, Arduino IDE
//https://cdn-shop.adafruit.com/datasheets/DRV2605.pdf
//Tom Igoe switch state example

#include <Adafruit_DRV2605.h>
#include <Wire.h>
const int onOff = 5;
const int pausePlay = 6;
const int skipForward = 9;
const int skipBack = 10;
const int fastForward = 11;
const int randomSong = 12;
const int one = 49;
const int two = 50;
const int three = 51;
const int four = 52;
const int five = 53;
const int six = 54;

int lastOnOff = HIGH; //start/stop button
int lastPausePlay = HIGH; //pause/play button
int lastSkipForward = HIGH; //skip forward
int lastSkipBack = HIGH; //skip back
int lastFastForward = HIGH; //fast forward
int lastRandom = HIGH; //random song

Adafruit_DRV2605 drv;


void setup() {
  Serial.begin(9600);
  pinMode(onOff, INPUT_PULLUP);
  pinMode (pausePlay, INPUT_PULLUP);
  pinMode(skipForward, INPUT_PULLUP);
  pinMode(fastForward, INPUT_PULLUP);
  pinMode(randomSong, INPUT_PULLUP);
  drv.begin();
  drv.selectLibrary(1);
  //I2C trigger sends "go"
  //default internal trigger when sending GO
  drv.setMode(DRV2605_MODE_INTTRIG);
}
//1 = UP
//0 = DOWN
void loop() {

  int currentOnOffButton = digitalRead(onOff);
  int currentPausePlayButton = digitalRead(pausePlay);
  int currentSkipForwardButton = digitalRead(skipForward);
  int currentSkipBackButton = digitalRead(skipBack);
  int currentFastForwardButton = digitalRead(fastForward);
  int currentRandomButton = digitalRead(randomSong);

  //start/stop BUTTON
  if (currentOnOffButton != lastOnOff) {
    delay(10);
    if (currentOnOffButton == LOW) {

      drv.setWaveform(0, 47); //effect
      drv.setWaveform(1, 0); // end wave form

      //play the effect
      drv.go();
      //wait a bit
      Serial.write(49);
      Serial.println(47);
      delay(500);

    } else {
      drv.setWaveform(0, 111); //effect PLAY
      drv.setWaveform(1, 0); // end wave form

      //play the effect
      drv.go();
      //wait a bit
      Serial.write(49);
      Serial.println(111);

      delay(500);
    }
  }
  lastOnOff = currentOnOffButton;

  //Pause Play Button
  if (currentPausePlayButton != lastPausePlay) {
    delay(10);
    if (currentPausePlayButton == LOW) {
      drv.setWaveform (0, 98); //set wave form
      drv.setWaveform (1, 0); //end wave form

      drv.go();
      //wait a bit
      Serial.write(50);
      Serial.println(98);
      delay(500);
    } else {
      drv.setWaveform(0, 47); //effect PLAY
      drv.setWaveform(1, 0); //end wave form

      drv.go();
      Serial.write(50);
      Serial.println(47);
      delay(500);
    }
  }
  lastPausePlay = currentPausePlayButton;

  //Skip Forward Button
  if (currentSkipForwardButton != lastSkipForward) {
    delay(10);
    if (currentSkipForwardButton == LOW) {
      drv.setWaveform(0, 86);
      drv.setWaveform(1, 0);
      drv.go();
      Serial.write(51);
      delay(500);
    }
  }
  lastSkipForward = currentSkipForwardButton;

  //Skip Back Button
  if (currentSkipBackButton != lastSkipBack) {
    delay(10);
    if (currentSkipBackButton == LOW) {
      drv.setWaveform(0, 74);
      drv.setWaveform (1, 0);
      drv.go();
      Serial.write(52);
      delay(500);
    }
  }
  lastSkipBack = currentSkipBackButton;

  //FAST FORWARD
  if (currentFastForwardButton != lastFastForward) {
    delay(10);
    if (currentFastForwardButton == LOW) {
      drv.setWaveform(0, 76);
      drv.setWaveform(1, 0);
      drv.go();
      Serial.write(53);
      delay(500);
    }
  }

  lastFastForward = currentFastForwardButton;

  //Random
  if (currentRandomButton != lastRandom) {
    delay(10);
    if (currentRandomButton == LOW) {
      drv.setWaveform(0, 54);
      drv.setWaveform(1, 0);
      drv.go();
      Serial.write(54);
      delay(500);
    }
  }

  lastRandom = currentRandomButton;
  //
  //  Serial.print("Random ");
  //  Serial.println (currentRandomButton);
  //  Serial.print("FF ");
  //  Serial.println (currentFastForwardButton);
  //  Serial.print("Digital Read ");
  //  Serial.println (currentOnOffButton);


}