Unison by Ear

The unison is no distance at all across. Sung or played, it is one of thirteen answers, and the reason it stays hard is that 2 distances sit close enough to steal it: minor 2nd and octave. Turn it upside down and the same two notes come back as the octave, which is why that one belongs on the list.

Confusion setminor 2nd · octave — 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:

• Row, Row, Row Your Boat — sing it as one repeated pitch.
• One Note Samba — sing it as one repeated pitch.