1. void draw() {
2.   if (keyPressed == true) {
3.     println(key);
4.   }
5. }

1. void draw() {
2. // draw stuff
   
3. }
4. void keyPressed() {
5.     println(key);
6. }

1.  player1 = minim.loadFile("ondas.mp3");
2.  player2 = minim.loadFile("repente.wav");

1. void keyPressed() 
2.  {
3.     if ((key == 'o') || (key == 'O')) {
4.       player1.play();
5. } 
6.     if ((key == 'r') || (key == 'R')) {
7.       player2.play();
8. } 

" Because of how operating systems handle key repeats, holding down a key may cause multiple calls to keyPressed() (and keyReleased() as well).

1. void setup(){
2. }
3. 
   
4. void draw(){
5. }
6. 
   
7. void keyPressed(){
8.   println("Pressed   " + millis());
9. }
10. 
    
11. void keyReleased(){
12.   println("Released   " + millis());
13. }

The keyReleased() function is called once every time a key is released. The key that was released will be stored in the key variable. See key and keyReleased for more information.