Hear a 3-note pattern, then sing it back.
Why this matters: this is the bridge between hearing a melody and reproducing it. Every small loop, transposition, and improvisation in the graph above lives on this skill.
6 patterns, 3 notes each. Match each note within 100ยข for ~1 second. Hit at least 2 of 3 to pass a pattern; 5 of 6 passes the session.