What Does Mastering Actually Do to Your Music?

The first time my band got a master back from the engineer who would go on to become our go-to guy for everything (shout-out, Ted Audio) is a moment I still think about 20 years later. It was like someone had finally captured our sound and presented it the way it was always supposed to be presented. I couldn't stop listening to it, and I couldn't wait to share it with the world.

That feeling is what mastering is supposed to do. But a lot of bands don't fully understand what actually happens between the mix and that moment, or whether they even need mastering in the first place.

Do You Actually Need Mastering?

This question is more controversial than you might think. Some camps think everything needs to be mastered (most of them are trying to sell you mastering services or plugins online), but I disagree. If you're releasing a single, the truth is you probably don't need a separate mastering phase.

Everything mastering does for a single, including frequency polish, loudness, and limiting, can be done on the mix bus during the mix itself. A compressor for glue, a dynamic EQ to tame any frequency spikes, and a limiter to hit your platform's loudness target. Even formatting (which traditionally is a mastering engineer's job) can be done using presets that live in every modern DAW. If the mix sounds good and it's loud enough, it's done. Sending it to a mastering engineer isn't going to do anything extra. At best, it's a second set of trained ears, which is never a bad idea, but a separate mastering session for a single isn't necessary. Pushing a mix that's already finished through another round of processing can actually make it sound worse. Too much of a good thing is too much.

Mastering becomes genuinely necessary when you're releasing multiple songs together in an EP or LP. That's when the real work happens.

What Mastering Actually Does for an EP or LP

Think of mastering a multi-song project like mixing an album, except instead of manipulating individual instruments, you're working with the finished songs as a whole. The goal isn't just loudness, it's cohesion.

When a band records an EP or an LP, the songs are usually mixed at different times, sometimes in different sessions. The kick drum might feel slightly different from track three to track four. The overall brightness might shift between songs. Left alone, those differences make an album feel like a playlist instead of the cohesive piece of art it's supposed to be.

Mastering fixes that.

The process involves standard EQ to subtly shape each song so the transition from one to the next doesn't feel jarring. Dynamic EQ smooths out frequency build-ups across the project. Mid/side EQ dials in stereo width so the image feels consistent. Tools like RESO from Mastering the Mix handle resonant frequencies that standard EQ can miss. And limiting brings every song to the right loudness for the platform it's going to.

Sometimes the process also includes sound design, adding transitional elements that guide the listener from one song to the next (like the alarm clock from "In Love and Death" by The Used). That kind of detail is usually discussed during pre-production or mixing, but occasionally it comes up during mastering.

Mastering Isn't Magic

Send a mastering engineer a mix that's in good shape, and they'll make it shine. Send them a mix that needs work and the best they can do is limit the damage.

If the low end is a mess, if the vocals are buried, if the snare is poking through everything (if you compulsively blink during every snare hit, you've got a problem) , and nobody caught it during the mix, mastering won't fix any of that. The tools available at the mastering stage are broad strokes applied to the entire song at once. There's no way to pull up just the snare or fix just the low end without affecting everything else in the frequency range. Those are mix problems, and they need to be fixed in the mix. Get the mix right first.

The Bottom Line

Mastering isn't a magic step that makes every song better. For singles, a well-executed mix is enough. For EPs and LPs, mastering is what turns a collection of songs into a cohesive body of work. If you're working on a multi-song release and want it to feel like one piece of art from start to finish, Riot Anthem Studios provides mastering services for bands in the Punk, Pop-punk, Emo, and Hardcore genres. We can even be that extra set of trained ears on a single.