If memory serves, this was the first version of "Nucleus" and it was the first tune that I created at the School of the Art Institute of Chicago's (SAIC) Sound Department. I used their synthesizer, drum machine, recording equipment.
Here's where you can hear the second version: https://on.soundcloud.com/Pw47xuJdgSymWLuT8.
Here's where you can hear the third version: https://on.soundcloud.com/nBMAuYFT2yzg8Ra77.
