Set myself a one-note challenge and this is what turned out of Omnisphere (Except drums) https://soundcloud.com/biodiode/cosmic-whirlpool

very enjoyable.  Did you consider portamento on those octaves?  Just curious about your preferences.

With the right sounds much can be achieved with just a single note, I like Adrian. 

Thank you David. There is a touch of Portamento on the lead sound and I cut it back from what it was as it sounded strange in a bad way. It was probably the sound that I had chosen to carve that may have lead to the small issue.
 
Thanks Wookiee, I was surprised myself. Although having heard my first version of this I wondered what had I done as it sounded really bad. 

 
That's a lot done with just one note. Very creative and spacy. Cool track !!

Thank you Ramesh, glad you enjoyed it.

Very clever, sorta war of the worlds kind of thing. Great soundscape and kind of scary, loved it!

Thank you 

Nice vibe.....   I likes it.   
 
Although I do hear hints of 3rds and 5ths, although that could be overtones from the patches your using?    Who cares, it sounds good.