Korean · Pronunciation Guide
ban-gap-tta. A ㄱ that voices after the nasal, an unreleased ㅂ, and a tensed ㄸ to finish.
bangapda
Three beats. Yet another ㅂ-irregular, so the greeting form 반가워요 turns the buried stop into a w and adds a syllable, which is the shape you will actually hear and use.
Listen: 반갑다
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만나서 반가워요.
Mannaseo bangawoyo.
Nice to meet you.
Listen: 만나서 반가워요.
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만나서 반가워요 uses that irregular form and puts 만나서 in front, whose geminate n across the 만+나 seam gives the phrase a long nasal before the greeting proper begins.
Aspirating the middle ㄱ into 'ban-kap' misses the post-nasal voicing, and releasing the ㅂ misses the silent closure. Then there is the tensed ending, which learners soften because nothing in the romanization warns them -- all three are invisible in the spelling.