mp3-player code

#include <SoftwareSerial.h>
#include <DFPlayer_Mini_Mp3.h>
SoftwareSerial mySerial(11, 10); //(RX, TX);
//
void setup () {
    Serial.begin (9600);
    mySerial.begin(9600);
    mp3_set_serial (mySerial);
    delay(10);
    mp3_set_volume (30);
}

//
void loop () {

  while (Serial.available() >= 0){
    int Var = Serial.read();

    switch(Var){

      case '1':
      mp3_play(1);
      break;

      case '2':
      mp3_play(2);
      break;

      case '3':
      mp3_play(3);
      break;

      case '4':
      mp3_play(4);
      break;

      case '5':
      mp3_play(5);
      break;

      case '6':
      mp3_play(6);
      break;

      case '7':
      mp3_play(7);
      break;

      case '8':
      mp3_play(8);
      break;

      case '9':
      mp3_play(9);
      break;

      case '0':
      mp3_play(10);
      break;
    }
  }
}

/*
   mp3_play ();        //start play
   mp3_play (5);    //play "mp3/0005.mp3"
   mp3_next ();        //play next
   mp3_prev ();        //play previous
   mp3_set_volume (uint16_t volume);    //0~30
   mp3_set_EQ ();    //0~5
   mp3_pause ();
   mp3_stop ();
   void mp3_get_state ();     //send get state command
   void mp3_get_volume ();
   void mp3_get_u_sum ();
   void mp3_get_tf_sum ();
   void mp3_get_flash_sum ();
   void mp3_get_tf_current ();
   void mp3_get_u_current ();
   void mp3_get_flash_current ();
   void mp3_single_loop (boolean state);    //set single loop
   void mp3_DAC (boolean state);
   void mp3_random_play ();
 */