How to pronounce ngã

The tilde tone — ã. It rises, and it breaks in the middle. That break is the whole difficulty, and it is the thing recordings never explain.

What the voice actually does

Pitch falls slightly, then climbs — and about halfway through, the voice catches. Not a pause: a constriction. The vocal folds squeeze for a fraction of a second, the sound goes creaky, and then the rise continues.

In this app's reference data, that break sits at 45% of the syllable, averaged over 145 native recordings. It is not a stylistic flourish — it is the tone.

Why it is confused with hỏi

ả and ã both fall and come back. The difference is entirely in how they come back: hỏi glides, ngã catches. Miss the catch and you have said a different word — mả is a grave, mã is a horse.

This is the single contrast that takes longest for every learner, whatever their first language. It is worth spending real time on.

If you are learning southern Vietnamese, skip it

Southern speech merged hỏi and ngã. There is no break: both are produced roughly like the northern hỏi. The spelling still distinguishes them, so you have to learn which word takes which mark — but your mouth only needs one gesture.

This is why the app asks which Vietnamese you are learning before the first lesson, rather than teaching you both and letting you sort it out.

How to know you got it

You cannot hear your own pitch while you speak — your skull conducts sound differently than air does, and your attention is on the word. Recordings do not help: you repeat, it sounds right to you, and it is wrong.

Seeing it works. Say mã, and the app draws your pitch over the native curve. The break either shows up as a gap in your line, or it does not.

Also worth reading: all six tones.