But, not really. My current concept of voice is more like this:
(Or so I discovered today as I had the most emotional release I've ever had from writing fiction. It was like intense pent-up journaling. I cried after writing my first scene today. Cried. Writing fiction has never made me cry before.)We have so many voices in our heads. Characters and critics. Goofballs and meanie-heads. Some want to sabbotage us. Some want to sway. When the voice is weak, it isn't because the writer doesn't have a voice, its because he has too many.
So, I say: Don't find your voice. Listen.
Listen to just one voice at a time. You are the filter. Your voice is actually your ear. Your characters are the speakers. Listen to one voice with one ear at a time.
Focus on the narrator first and foremost hearing no one but your narrator. When its time for dialogue, listen to the other characters, but never loose connection to the narrator (whether in 1st or 3rd) because they are still telling who to listen to and how.
Don't find. Filter.
Filtering your voice is a lot like growing up. You slough off all of those things that other people wanted you to be, that you wanted you to be, and you're left with the common denominator. The core. The thing that needs to be said.
Your voice is already there. The question is: what, if anything, or who, if anyone, is blocking it? Give your narrator the mic.
You may be thinking, but I'm supposed to have the voice, not my narrator. Your narrator is a part of you. So as long as you are listening, really listening, to what the narrator needs to say, then you will be the one who is speaking.