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The pronunciation of any word in English (or any language at all) is not Universal.  This is because there are many different dialects of The English Language — both throughout America, and also world-wide.  The pronunciations that are presented on GiveMeSomeEnglish!!! are based-upon a combination of both “common usage”, and the most neutral accent used in The International Common Tongue — a.k.a. “American English”.
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Audio – For this word:  the “Au” combination is pronounced like the “aw” combination;  the “d” is pronounced as a flap-d;  the “i” is pronounced like the long letter “e”;  there is a phantom consonant letter “y” in-between the “i” and the “o” (this is a product of the transition from one sound to the next);  and the final “o” is long.

– /AW-dee-yo/ – /ˈɔ.ɾiː.jo/ – Notice also that the stress is on the first syllable –

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Learn More About The Word “Audio” On Wiktionary

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