Southerners generally break up words with single vowels into double vowels, or diphthongs
So that the pronunciation of words like "yes" and "glad" come close to sounding like:
A-a-a-ay
First I'mma scoop up the females
Pick up an ounce of fair veal
Drop that off in Riverdale
They coming straight to own that ill
What a party don't start until a quarter to twelve
And don't nobody start cutting 'till cutter get down
You can catch me-
(Ay, ay)