Use of an with an acronym

Question

Is it correct to write 'an'in the sentence "proud of being 'an' LSRite", where LSR is an acronym?

Answer 1

Oxford definition of an:

The form of the indefinite article used before words beginning with a vowel sound

In other words, it's the sound of the next word that determines a vs an, not the letter with which it begins. Since LSRite begins with an el sound, it would be correct to us an.