How do you say silver ingot?

What is the definition of ingot?

An ingot is a mass of metal that has been cast into a size and shape (such as a bar, plate, or sheet) that is convenient to store, transport, and work into a semi-finished or finished product. The term also refers to a mold in which metal is so cast.

How is a pronounced?

Does anyone know if there are rules governing the pronunciation of “a”? It’s either “AYE” or “UH”, depending on the word following.