
Max M. answered 07/10/19
Harvard Literature major with 20 years of coaching writers
To add onto that, "comprise" can mean both "be made up of" and "make up." So, just to complete Demilya's example: "The USA is comprised of 50 states" and "50 states comprise the USA."
But it is the first one that you'd be using in your sentence. To me, it...kind of works. It's not exactly wrong, but it is a little confusing, and also wordier than you need to get the idea across; and wordiness is usually one sign that your writing isn't as "nice sounding" as it could be.
What about "...in a soft, simple voice without even the faintest tremble?"