Weeks 3-4 ยท ear
Hear the color. Major 2nd, 3rd, or perfect 5th?
M2 = step (Happy Birthday opening). M3 = brighter, fuller (Oh When the Saints). P5 = open, hollow (Twinkle opening, Star Wars). The interval root is randomized between C4 and C5.
18 prompts. Hit 15 to master the node.