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Northern: 6 spoken tones. ngã has a break. nặng has a final catch. Pitch is not enough.
Dialect
Voice
Northern mả (hỏi, dip) is not mã (ngã, broken).
This session
Northern (Hanoi). One contrast, about five minutes.
This word
5:00
mả
grave
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Contrast drills
This page is one contrast for about five minutes. Which tone did you hear? is the listening game. /practice/sac-vs-nga uses the same pitch check as this page. Other pair URLs stay conditions-only recording checks — not the DSP judge; they do not pass or fail tone.
Your memory — what this device remembers. Nothing leaves it.