Nortaneous wrote:does that dialect not have { > e@ / _{m n}?
Well, I just heard the person say a couple of sentences, so I can't be quite sure what dialect they spoke, but I'm in a North Midland area on the edge of Appalachia - though with few actual Appalachian speakers in this locale, as far as I can tell. Lots of people from across Ohio and the Midwest. In any case, they didn't have æ-tensing. Wikipedia says æ-tensing is a characteristic of General American/the Midlands, but I personally don't have it, and I've rarely noticed it amongst anyone besides obvious Southern or Appalachian speakers.
I personally have /æ/ in "mayonnaise", "crayon", and "graham", which, also according to Wikipedia, are hypercorrections of historical /eə/ in non-æ-tensing varieties.
Also I will say that that X-SAMPA was extremely confusing to decipher at first.