[Avodah] Pronunciation of Hashem's Name

[matthewjmiller07 at gmail.com]

In Orach Chaim Siman 5, the Shulchan Aruch discusses the kavanos of
Hashem's name. The commentators (e.g. the MB, Shaarei Teshuva,etc.) use
this short siman as an opportunity to talk about the pronunciation
of Hashem's name. One opinion, brought down by the Be'er Heitiv from
the MA from the Bach says some pronounced Hashem's name with a tzerei.
What is this talking about? Also, in what other ways were different
communities acustomed to pronounce Hashem's name (e.g. some speak of a
shva na instead of a chataph patach under the alif in Hashem's name)?