Wonderful!

Brians description of an endless version of Music for Airports fits the app perfectly. There are two main options: Listen, or conduct. The algorithm powering the listen mode is excellent, providing a lovely soundscape in true ambient spirit.
The Conduct mode lets you tap on the triangles as you see on the screenshot. Doing so allows you to trigger samples of either the singers voice or the piano (in either high or low pitches).

The multiple player option allows the Listen mode to adjust the density of its algorithmic triggers, allowing for each device to set off only simple combinations that will work well across multiple outputs.

My only gripe: knowing a bit more about what happens behind the scenes and the samples we can trigger! Perhaps Mr. Chilvers will educate us on his website.

Anthony Lavado about Air