Q:

How do I pronounce Emacs?

I struggle to pronounce many computer terms, and to this day still mispronounce latex in my head - it just sounds better rhyming with flex. 
How would I pronounce Emacs?

A:

Just think of E-max. The letter E is pronounced like the name of the letter is pronounced.
I has the same sound as in need, clean, feel, green etc.
Also, I recommend this video: 
How to Say or Pronounce Emacs

