This is an experiment using two distinctly composed lines, each in its own key. The keys are R70 (D Major) in the tempo of 131.25BPM and R40 (E Major) in the tempo of 150BPM. The lines interact in an 8-bar pattern in a 7:8 relationship.

Interestingly, even though the lines are similar in timbre, the tuning of each line causes the ear to psychoaccoustically ‘track’ with each line without confusing them. In panning, they end up trading places, and the ear can follow the motion.

See more about Integrated Frequency.

Hope you enjoy!