Pitch memory

Reference tone → silent gap → test tone — name it.

• The gap grows each question — 0.5s at Q1 to ~7s by Q10 — so later reps rely on long-term pitch memory rather than short-term echo.
• All four options sit on the same side of the reference, so relative pitch height can't narrow the answer.
• The reference changes every question.

Genuine absolute pitch isn't trainable in adults, but long-term memory against a stable anchor is — that's what this drills.