The phrase "a final voice" is correct and usable in written English.
It can be used to refer to the last opinion or decision in a discussion or debate, often implying authority or finality.
Example: "After much deliberation, the committee reached a consensus, but the chairperson had the final voice on the matter."
Alternatives: "the ultimate say" or "the last word".
We are offered regular sermons, notably from Alec Baldwin in his briefings and from Kate Beckinsale in a final voice-over, on the principles of combat and the lessons of loss; and our eyes are averted to Washington, D.C., where a staunch F.D.R. (Jon Voight) urges his countrymen first to vigilance and then to arms.
John Blutarsky – In a final voice-over a shot of the White House, Landis remarks that the viewers all know what happened to Bluto and Mandy Pepperidge: they became the President and First Lady of the United States.
The shape would be like that of a growing double wave with a tremor of genesis in the voice of a child in 1966, before bellying in both directions at its widest point to create a climax around the disaster of depth, height and weight, then a gradual reduction and focusing to a single, final voice in the present.
He added, "I would suggest that anybody who has a job working for a TV show where you're not the final voice, where you're one of 150 people working on it, should find a creative outlet where you're the boss, where you're not always collaborating and competing".
Inspired by Arianna's observation about John McCain channeling George C. Scott in Dr. Strangelove, the team at Brave New Films has put together this video (with a hat tip to MSNBC's Joe Scarborough for providing the final voice over -- and the best campaign slogan ever!) Check it out.
In this vast, diverse country, we depend on the Supreme Court as the final voice.
But as the final voice in the play's opening chorus proclaims, "Bradley Manning is Welsh!" It's not symbolic.
In Brown's era, the coach-authority was the final voice: no questions asked, no debate, no compromises.
— Jeff Gordinier The Village Voice: The restaurant critic Tejal Rao, who resigned from her post at the troubled weekly this week, files her final Voice review, of Wylie Dufresne's Alder.
Gwen attended the final Voice AGM in 2013, when the organisation joined the Coram group of charities to become Coram Voice.
His was the final voice within the firm on questions of whether auditors would sign off on contentious accounting treatments sought by customers.
