When I saw this app I was not sure what should I make of it, but I have decided to buy the easy times for the price you can I do not do much wrong. What can I say I did not regret it because it is quite relaxing and enjoyable to hear when the volume ratio voice / music has set as a comfort zone. Also I feel the piano is not as annoying .... On the contrary, I will continue to listen to every case as recommended and must say that I've become curious on the other app's of this series a little .... everyone feels it, of course, but differently from me a clear recommendation ....