Fun hip hop ish beat in 13-tone equal temperament aka 13edo which squeezes one extra note into the octave then makes all the notes equal size. One cool thing about 13-tet is, if you play a whole-tone scale, it will miss the octave completely and won't repeat until you reach 2 octaves, using up all 13 notes in the process! You can hear this about half way through the track.