Ludovico Einaudi made the "Experience (Instrumental)" composition. Long at 6:22, this melody, like many others of this mood-sensitive composer, performed on the piano, brings such humane feelings from the depth of our souls, like regret and empathy. Piano perfectly complemented by the guitar strings that easily fingered by second musician. As a result, a lot of instruments get into the waves of composition that are at the end powerfully amplified with violin. You would like to listen to it for more than once.
Reference:"In A Time Lapse": Amazon.co.uk