The Adobe Acrobat "Read out Loud" feature was designed primarily as an accessibility feature, to help readers with visual or other reading impairments.
You might not even know the facility is there, but it also happens to be a valuable writing tool. If you hear your work read back to you, you can spot repeated phrases, illogical progressions from one argument to the next, or other irritating sentence structures that just don't sound right.
Karen explains how it works, HERE. (It's a pdf for you to practise on!)