Originally Posted by dub08
We never know, he could have recorded one monophonic line and, went back on it 2 times at different notes!
hope that helps get you closer and, clears up what i was trying to say before.
Quite possible. Song sounds like it was something in the late 70s or early 80s so they might only had some monophonic synths and had to resort to overdubbing harmonies.
Could have also maybe used a multi oscillator synth tuned to harmonize but might have been tricky due to fixed intervals.