Quote:
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Originally Posted by Jeff Root
I'm not sure I've seen this distinction in other phonetic
systems. I have to believe that it's in the IPA, but I don't
recall finding it the last time I looked.
-- Jeff, in Minneapolis
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I don't think something as subtle as that would be in the IPA. The IPA actually isn't very specific in a lot of ways. Also, I'm pretty sure that the sound you're talking about is a diphthong anyway, and so wouldn't have its own IPA character. It would be [ai] anyway. And I think the difference is probably because in one case it's in front of a voiceless consonant and in the other it's voiced. But that's just a guess. In any case, you can find lots written about it if you google for "diphthong raising"!