So, I've had a lot of trouble with these. It's really confusing because there are like seven symbols that sound like "Bat", "Bak", and "Bap". Is there a trick to tell the difference?
Are you are talking about how, for example, 밪, 밧, and 밭 all sound the same (like 'bat with a suppressed 't') '?
If so, this isn't an issue with "ba", rather how Korean deals with final consonants. Specifically, Korean only allows a few final consonants, others (like 'ㅈ' and 'ㅅ') get folded into the ones that are allowed (like 'ㅌ').
If any of these syllables are at the end of a word, they are indistinguishable to the ear. If they are in the middle of a word, however, the consonant is pronounced as you would expect. Thus '바자' is 'baja', '바사' is 'basa' and '바타' is 'bata'.