According to an ad on Comedy Central:

[James Harbeck]

>>From the voiceover of another CC ad:
>
>" ... [kaer@ mEl]. Or is that [karm at l]?"
>
>This alternation is at least a century old, I'd guess.

Puts me in mind of Hall and Oates's early '80s
song "Adult Education," in which they sing the
title phrase [æ' d at lt - @ d at lt' - EdjIkejS at n],
always with the two pronunciations one after the
other.

But is there an identifiable isogloss that anyone knows of for caramel?

James Harbeck.

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