The phrase "as he amplifies" is correct and usable in written English.
It can be used when describing someone who is elaborating or expanding on a particular point or idea.
Example: "The speaker captivated the audience as he amplifies his argument with compelling evidence."
Alternatives: "as he elaborates" or "as he expands".
"An Oversimplification" blended live action with animation, reality with hypotheticals; in this video, Nance relies on ingenious stagecraft, deployed on location, to conjure dream worlds that might as well be animated, and he amplifies it with even more audacious visual design.
In the weeks after the N.I.E.'s release, Bush insisted that the Iranian nuclear-weapons threat was as acute as ever, a theme he amplified during his nine-day Middle East trip after the New Year.
Van Vechten grew up in Cedar Rapids, Iowa, and, even as a boy, he amplified these involuntary quirks with a number of voluntary ones: ascots, slim trousers, one long fingernail.
In the Americas the quality of weight, or grounding, that this position gave the man's body as he danced was amplified as he mimed motifs from daily work in agriculture and ranching.
The McCain campaign also has been quick to cite another chief strategist of Mr. Obama, David Axelrod, as he tried to amplify those now age-old remarks this morning on MSNBC's "Morning Joe: Well, first of all, everyone should go back and review the question that was asked in the debate last summer in which this was started.
Grossman's exaltation in human detail amplifies as he approaches the most brutally impersonal aspect of the Second World War, the Holocaust.
Was Trump trolling progressive college students with his reference to a "safe... place," or was it yet another example of his vertiginous capacity to absorb critiques and spew them back at the critics, amplified, as he did with such devastating effect during the campaign, whereby his opponent became "unfit" to be President and the mainstream media was "dishonest"?
He was known to incorporate natural hair into his pieces as well, amplifying the sense of realism.
AS, AR and MSK amplified the Ads.
If you amplify too much, as he did, the piano takes on an unnatural glare and boominess.
