Uh-oh the Hindi words for "I" and "in" are pronounced so similarly that I cannot tell the difference when hearing them! is this unique to the Duo computer voice or is it like that in natural speech as well??
No they are pronounced differently in the sound clip, मैं uses the long E, where में uses the short E, think of the short version as being pronounced like the English word Say, but without the elongated Y sound afterword, just a short E. Then the longer version is pronounced more like the word Meh, just without the H sound on the end. And of course both add nasalization.