I have a Yamaha Portatone PSR 202 piano, and I've looking in the manual for hours for the pressure option so that when I press a key lightly, the sound plays lightly, and if I press a key hard, the sound will be loud (like in acoustic pianos). So, does this piano even have this feature? If so, how do I enable it? Having all the notes play with the same volume takes away the "soul" of anything I play 
