It's a primer for singers. In music, the emphasis and flow between words is given for you. Aside: There are other biases built into Italian singing that will t

It's a primer for singers. In music, the emphasis and flow between words is given for you. Aside: There are other biases built into Italian singing that will trip up singers in spoken Italian, too. For example, Italian opera is largely written in a metric form where the phrase emphasis is ALWAYS on the last word. That teaches singers an instinct for odd sentence structure, or for putting a weird accent where it doesn't need to exist in speech.