Music for Concentration and Relaxation

I find Music for Aiports a very good set of music album to listen to. It consists of long tracks that aids in both mind relaxation and mind concentration. It can be looped and you won't even notice the start and end of each track. I first found this out in YouTube, and I'm impressed on the composition. It's quite different from those classical musical pieces, and it's truly suitable to be played in venues like airport or coffee shops.