Here is a mixing secret: There is no single piece of software sitting inside some legendary engineer's DAW that, the moment you install it, turns your home-recorded five-piece metal demo into a Meshuggah record.

Whether you're a metal band recording in your rehearsal space, a home-studio producer putting together a heavy music record, or someone with a proper studio setup, this guide walks you through exactly how to prepare your audio files for professional mixing and mastering. Get this right, and your engineer can focus on making your music sound incredible — which is the whole point.