I'm surprised noone has bought up the fact that Angie was originally titled Aung Kyi.
It was written when Keith was going through a period of deep Buddhist reflection (as he is want to do).
It was his homage to Burmese Nobel Laureate and activist Aung San Suu Kyi.
He composed it in a hotel in Burma on a traditional Burmese harp known as a Saung- Gauk.
A 14 string instument, but Keith usually takes one string off.
It was composed in the Burmese key of Q.
Hope that has cleared things up.