"Gotta" pronunciation

Recently, I realized that pronunciations of the reduction gotta in GB and US English are different.

Could you suggest to me, please, any tutorial explaining pronunciation of this and other such shortenings? It would be nice to find something with audio also. Usual textbooks avoid this subject since it is related to informal language, and it is very hard for me to get correct pronunciation from movies or TV series.

Solution 1:

The sound we use for this in American English is the alveolar flap. Knowing this name should help you find references that will help you (c.f. Wikipedia, for example).

I think of this substitution of the flap for both voiced and voiceless alveolar plosives between vowels in casual speech as a form of assimilation where we simplify the pronunciation into something very close to a liquid.

Solution 2:

if you are searching for a direct Britain/American pronunciation, I get you this advise: try with wordreference.com You can choose between the two ways. There are not all the words, but surely the most important