Chromatic: (adj) a musical scale including all existing pitches
I have sung for decades.
Sometimes your voice is not in good shape. Humidity can affect it–and stubbornly insisting you are on pitch is the best way to be out of tune.
So one of the best exercises for singing is practicing the chromatic scales up and down. Moving your voice only a half-step teaches you precision–and exposes those occasions when you might find yourself rubbing up against the correct tone but not actually owning it.
Now, if you’ve never sung, this may not mean anything to you. If you’re a singer, some of this may not mean anything to you.
But the reason I continue to sing is because it’s a wonderfully humbling chamber for the human ego, because there are three obvious realizations:
1. You’re at the mercy of your voice
2. There is no excuse for bad tone or bad pitch
3. There is always someone who will sing better than you.