i am using keypressed to play sound samples
and wondering how i can get one key to stop or pause all sounds that are playin.

but preferably, make the sound of that last "pauser" or "stopper" key play..

eg.
 
  if (key == 'i' ) {
      i.play (0);
      i.loop (2);
    }
   
     if (key == ' ' ) {
      z.play (0);
      i.stop();
   }

i tried the most obvious, but no luck

please please help help