Recorded in a park. Which one? As we discover, it doesn't really matter. Or does it?

We bring you a meditation on a new museum, Moroccan colours, and soundscapes. These range from white and green noises to aural symphonies that take in populated streets, babbling brooks, and plane engines.

Who are they for? What do they do? Let's find out.

And thanks for listening to our sound.

Music: Dirk Dehler's The Bright Star, Mr Smith's Circles Round the Sun & Podington Bear's Flute Fleet.