Two sounds close enough to trade places: the “j” of jump and the “ch” of chair. Swap one for the other and a different word comes out — this page is how to keep them apart, in both directions.
Keep your voice buzzing through the final consonant's stop and release instead of finishing voiceless.
“The ending pops but the buzz is missing! Keep the voice on through the pop, bello — soft and juicy, not crisp and dry!”Nunzio, when he hears it
You cannot hear your own swap. That is the whole problem.
Nunzio records you reading a sentence, scores every sound in it on your phone — nothing is uploaded — and tells you which of these two actually came out. Nunzio — Accent Coach is coming to the App Store and Google Play.