Tkakanren quirk

So there's that rhythmic staccato synth stab that plays throughout the three tracks which is distinct from the drums and lumbering bassline. I've always thought it just plays the one note the whole time, but in Tkakanren (the Quadrange version) at least, it starts alternating between two different notes most noticeable at 5:30 but definitely happens earlier and later. It plays 4 G's and then 4 E's. I think it even becomes D# at one point. Never noticed it before, I'll have to re-listen to the other versions and see if I can hear it anywhere.

... after skimming them a bit I can't tell if that alternating pattern occurs in the other Tankakern tracks. Confirm?

Stop the presses! A quirk in Tkakanren.

I just reaaaallly enjoy those background birdy whistles and chirps. hehe