I have to say I've never listened to music observing before but have always said I will and never got around to it or once I lug the scope out I can't be buggered walking back upstairs to get my Ipod
BUT, my backyard is ridiculously creepy at night and there is lots of russeling bushes and strange animal noises which is extremely unnerving when everyone else is asleep and you can't see where it's coming from. So I may give this music while observing thing a go...
My first picks would have to be:
Clint Mansell - The Fountain soundtrack
Explosions in the Sky - All Of a Sudden I Miss Everyone
Heaven and Hell - Vangelis (only just realised that Vangelis did the Cosmos theme omg I'm in love! Must have more Vangelis!!)
Ali Jihad Racy - Ancient Egypt
Desert Lounge Volume Two
Secret Chiefs 3