How can I make it sound when I hit the keyboard not only when I entered.

Hi guys. I got some trouble in progress.

import ddf.minim.*;
import processing.video.*;

Movie myMovie;
Minim minim;
AudioPlayer s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, s13, s14, bg1, bg2, bg3, bg4;

PImage bg;
PFont font;
int num = 500;
char t[] = new char[num];
int key_num = 0;
int text_w_gap = 40;
int text_h_gap = 70;
int ypos = 450;
int xpos = 510;
int val;
int notetime = 795;
//730 notetime for bg1 - single note
//235 notetime for bg1 fast tempo
//580 notetime for bg2 lick
//1300 notetime for bg3
// for play
int startTime;
int iForPlaySong=0;
boolean playSong=false;

void setup() {
  fullScreen();
  //size(1440, 900);
  bg = loadImage("paper.jpg");
  font = createFont("Albertsthal Typewriter.ttf", 14);
  textFont(font, 64);
  fill(40);
  minim = new Minim(this);

  s1 = minim.loadFile("1.mp3");
  s2 = minim.loadFile("2.mp3");
  s3 = minim.loadFile("3.mp3");
  s4 = minim.loadFile("4.mp3");
  s5 = minim.loadFile("5.mp3");
  s6 = minim.loadFile("6.mp3");
  s7 = minim.loadFile("7.mp3");
  s8 = minim.loadFile("8.mp3");
  s9 = minim.loadFile("9.mp3");
  s10 = minim.loadFile("10.mp3");
  s11 = minim.loadFile("11.mp3");
  s12 = minim.loadFile("12.mp3");
  s13 = minim.loadFile("13.mp3");
  s14 = minim.loadFile("14.mp3");
  bg1 = minim.loadFile("bg1.mp3");
  bg2 = minim.loadFile("bg2.mp3");
  bg3 = minim.loadFile("bg3.mp3");
  bg4 = minim.loadFile("bg4.mp3");
}

void draw() {

  background(bg);
  text("Like I said", 300, 110);
  text("Say what you wanna say", 300, 210);

  if (playSong) {
    if ( millis()>startTime+notetime) {
      if (iForPlaySong < key_num) {
        println("play " + t[iForPlaySong]);
        playNote(t[iForPlaySong]);
        iForPlaySong++;
        startTime=millis();
      }
    }
  } else
  {
    for (int i=0; i<key_num; i++) {
      text(t[i],
        (xpos+(i*text_w_gap))%width,
        ypos+( (int(xpos+(i*text_w_gap))) / width * text_h_gap));
    }
    if (key_num >= num) {
      key_num = 0;
    }
  }
}

void keyPressed() {
  if  (key==8) {
    key_num--;
  } else if (key==RETURN||key==ENTER) {
    println("Here 11111111111111111111111");
    playSong=true;

    bg2.play();   // for the bgm --------------------------------------- here

    startTime=0;
  } else {
    t[key_num] = key;
    key_num++;
  }
  println("pressed " + int(key) + " " + keyCode);
}

void playNote(char val) {
  if (val=='q') {
    s1.play();
    if (s1.position() > notetime )
    {
      s1.rewind();
    }
  }
  if (val=='w') {
    s2.play();
    if (s2.position() > notetime )
    {
      s2.rewind();
    }
  }
  if (val=='e') {
    s3.play();
    if (s3.position() > notetime )
    {
      s3.rewind();
    }
  }
  if (val=='r') {
    s4.play();
    if (s4.position() > notetime )
    {
      s4.rewind();
    }
  }
  if (val=='t') {
    s5.play();
    if (s5.position() > notetime )
    {
      s5.rewind();
    }
  }
  if (val=='a') {
    s6.play();
    if (s6.position() > notetime )
    {
      s6.rewind();
    }
  }
  if (val=='s') {
    s7.play();
    if (s7.position() > notetime )
    {
      s7.rewind();
    }
  }
  if (val=='d') {
    s8.play();
    if (s8.position() > notetime )
    {
      s8.rewind();
    }
  }
  if (val=='f') {
    s9.play();
    if (s9.position() > notetime )
    {
      s9.rewind();
    }
  }
  if (val=='g') {
    s10.play();
    if (s10.position() > notetime )
    {
      s10.rewind();
    }
  }
  if (val=='z') {
    s11.play();
    if (s11.position() > notetime )
    {
      s11.rewind();
    }
  }
  if (val=='x') {
    s12.play();
    if (s12.position() > notetime )
    {
      s12.rewind();
    }
  }
  if (val=='c') {
    s13.play();
    if (s13.position() > notetime )
    {
      s13.rewind();
    }
  }
  if (val=='v') {
    s14.play();
    if (s14.position() > notetime )
    {
      s14.rewind();
    }
  }
  // ---------------------------------- LEFT SIDE --------------------------------
  if (val=='y') {
    s1.play();
    if (s1.position() > notetime )
    {
      s1.rewind();
    }
  }
  if (val=='u') {
    s2.play();
    if (s2.position() > notetime )
    {
      s2.rewind();
    }
  }
  if (val=='i') {
    s3.play();
    if (s3.position() > notetime )
    {
      s3.rewind();
    }
  }
  if (val=='o') {
    s4.play();
    if (s4.position() > notetime )
    {
      s4.rewind();
    }
  }
  if (val=='p') {
    s5.play();
    if (s5.position() > notetime )
    {
      s5.rewind();
    }
  }
  if (val=='h') {
    s6.play();
    if (s6.position() > notetime )
    {
      s6.rewind();
    }
  }
  if (val=='j') {
    s7.play();
    if (s7.position() > notetime )
    {
      s7.rewind();
    }
  }
  if (val=='k') {
    s8.play();
    if (s8.position() > notetime )
    {
      s8.rewind();
    }
  }
  if (val=='l') {
    s9.play();
    if (s9.position() > notetime )
    {
      s9.rewind();
    }
  }
  if (val=='b') {
    s10.play();
    if (s10.position() > notetime )
    {
      s10.rewind();
    }
  }
  if (val=='n') {
    s11.play();
    if (s11.position() > notetime )
    {
      s11.rewind();
    }
  }
  if (val=='m') {
    s12.play();
    if (s12.position() > notetime )
    {
      s12.rewind();
    }
  }
  if (val=='.') {
    s13.play();
    if (s13.position() > notetime )
    {
      s13.rewind();
    }
  }
  if (val=='?') {
    s14.play();
    if (s14.position() > notetime )
    {
      s14.rewind();
    }
  }
}

This is the code.

I want to make 2 things change.

1. Make it play the sound not only when I hit the enterkey, also make sound when I hit the key.

2.When I done the interaction, how can I make it run again like 1 minute later?

I got some more problem now, but I want to solve this first. :(

Thanks for watching.