A depressed voice is for those times when, like the song says "nothing seems to fit," and everything seems wrong. When you need a performer to evoke that heart-rending sadness that will tug at your audience's heartstrings, then this is the place.
Sometimes it's all about sorrow, sadness, and hearbreak. While those may not be the most appealing qualities at first glance, they're a necessary part of an actor's dramatic palette. Bringing in these common emotions can make a project stand out and reach new levels of emotional depth and resonance. These performers can connect with these painful states while delivering a compelling, clear reading that'll have your audiences reaching for the Kleenex.
Everybody (hopefully) has a heart, and there are many ways to touch on those emotions of sadness, regret, and bitter despair. The dejected antihero who will stop at nothing because everything's been taken from them; a PSA making people aware of the pervasive, all-encompassing effects of depression; a character who's going through the inevitable moment of darkness before the dawn. The creative possibilities of the depressed voice are huge.
Low, with slightly-slurred speech, and a cadence that can only remind the listener of pain and sorrow. The flat, labored affect of a depressed voice, with its stops and pauses, is heartbreaking to hear.