The World of Avlis

I'm wondering about how to pronounce the e in Avlissian Elven.

Take for example a word like shemath. Is it shee-math or a softer e sound like sha-math?

And at the end of a word? As in oolle, is it oo-lay or just ool?

I understand this might be a bit pointless as most of us will never use this as a spoken language. It still would be nice to know.

It's half way between an e as in bed and an a as in bay. We don't have that sound in english