Minor 2nd by Ear

The minor 2nd is 1 semitone across. Sung or played, it is one of thirteen answers, and the reason it stays hard is that 3 distances sit close enough to steal it: unison, major 2nd and major 7th. Turn it upside down and the same two notes come back as the major 7th, which is why that one belongs on the list.

Confusion setunison · major 2nd · major 7th — drill it against these, never on its own. It is the reference every other answer is measured against, so it never shows up inside a chord round as a colour of its own.

Anchor tunes, each with the direction to move your voice — the part of an anchor that actually transfers:

• Jaws (main theme) — sing it upward from the reference.
• Für Elise — sing it downward from the reference.
• Joy to the World — sing it downward from the reference.