This works best after a first read, not before one. If the source is brand new and dense, audio alone can hide what you have not understood yet. The sweet spot is the second pass: you already know the rough structure, and the audio helps you revisit it often enough to keep moving.
It is also not the same as a generic text-to-speech tool. A useful study podcast should surface the main thread, the claims worth remembering, and the spots that deserve another look. If every section sounds flat, the output is too close to passive listening and should feed into a tighter quiz or flashcard round.