American short a /æ/, short O /ɑ/, short u / ʌ /

Cap-Cup-Cop (The 3 A’s) | American English Pronunciation

short a /æ/ = AA (Front a)
short u /ʌ/ = UH (Central a)
short O /ɑ/ (Back a)

Pronouncing short a /æ/ in American English

American English – AA [æ] Vowel (Rachel)

Vowel Sound / æ / as in “cat” – American English Pronunciation

How to pronounce the English short a sound /æ/ (Tarle)

How to Pronounce [æ] before [n], [m], or [ŋ]

How to Pronounce [æ] before [n], [m], or [ŋ] (My page)

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English Short O Sound – /ɑ/

Vowel Sound / ɑ / as in “got”- American English Pronunciation

Pronouncing the short o /ɑ/ in American English

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American English – UH [ʌ] Vowel (Rachel)

Vowel Sound / ʌ / as in “us”- American English Pronunciation

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Bus or Boss? Luck or Lock? American English Pronunciation

How to Pronounce AH vs UH: American English