What is subject and verb in this sentence Soft voices the patter of little feet signal their approach?

Here's the breakdown of the subject and verb in the sentence:

* Subject: Voices (This is the noun performing the action)

* Verb: Signal (This is the action the voices are performing)

Explanation:

The sentence is actually a bit tricky because it uses a collective noun ("voices") as the subject. The phrase "the patter of little feet" is acting as a modifier, telling us what kind of voices we're talking about.