To *[mispronounce]* err is human

I have always heard “err” pronounced as “air” in standard American English; this is my conversational language reality. However, every American voice actor on audiobooks to which I listen says it as rhyming with “her”.

My Miriam-Webster dictionary suggests the pronunciation of err both ways and offers no real clarification or distinction. The OED suggests “ur” [pronounced əː] in British English, and both “urr” [pronounced ər] and “air” [pronounced ɛ(ə)r] in American English.

Apparently it’s all good. I ask, why then is it I only hear “to *urr* is human” in audiobooks?

Edit: Many responders ask or assume that the audio is AI generated. Nope. It’s a human voice. One of my ebooks, for example, is recorded by voice actor Sean Crisden.

Bonus question: What’s your opinion about **error**?