Sing the named degree of the major scale.
Why this matters: do, re, mi, sol, la are the five degrees that show up in almost every folk and pop melody. Once you can find them by feel from any tonic, you can sing or play melodies by ear.
10 prompts. Each starts with a 1-3-5-3-1 arpeggio to lock in the key, then plays the target degree. Hold within 100ยข for 1.5s. Hit 7 to pass.