Another of their tracks I like is 'Intersteller Overdrive'

I think Syd was very underated. This track really goes places.

On the 'Echoes' subject. I've always liked this track especially when it was used in the film Crystal Voyager. It fitted in SO well with all those waves.

The Electronic section in the middle always conjures up a picture of a lonely lighthouse on a rock in the middle of the ocean with it's beacon sweeping across the water.