How to Master a Song — The Complete Guide

Mastering is the last thing standing between your mix and the listener. Here's exactly what it is, how it works, and how to do it right — or let the AI handle it in 60 seconds.

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Understand Mastering

Learn what mastering actually does, step by step — EQ, compression, limiting, and loudness targeting.

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Hit Streaming Targets

Spotify, Apple Music, YouTube all have loudness standards. Master to spec so your track doesn't get turned down.

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Skip the Learning Curve

Don't have time to learn a mastering chain? Upload your track and the AI does all of this in seconds.

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Feedback on Your Mix

Find out what specific issues in your mix are making mastering harder — and fix them on the next track.

What Mastering Actually Does

Mastering is the bridge between a finished mix and a released track. A great mix can still sound thin, quiet, or harsh compared to professional releases — mastering fixes that. It ensures your track is loud enough to compete on streaming platforms, tonally balanced so it sounds good on every speaker system, and dynamically consistent so nothing jumps out or disappears.

Step 1: Start with a Clean Mix

Before you master anything, your mix needs to be right. Turn off any limiter or maximizer on your master bus and export as a 24-bit WAV with 1–3dB of headroom (the loudest peak should hit around -1 to -3dBFS). Mastering can't fix a bad mix — it can only polish a good one.

Step 2: EQ for Tonal Balance

The first tool in any mastering chain is a broadband EQ. The goal isn't to do heavy surgery — that should have happened in the mix. You're making subtle corrections: a slight high-shelf boost for air, a dip in the low mids if things feel cloudy, a gentle low-end roll-off below 30Hz to remove rumble. Small moves, broad curves.

Step 3: Multiband Compression

Multiband compression splits your audio into frequency bands and compresses each one independently. This lets you control a boomy bass without affecting your midrange, or tame harsh highs without killing your low end. Go gentle — 2–3dB of gain reduction at most in any band. Heavy multiband compression is the fastest way to make a master sound over-processed.

Step 4: Stereo Width

A subtle stereo widener can add depth and space to your master. Keep the low end (below 200Hz) in mono — spreading bass frequencies causes phase issues on mono playback. The widening should happen in the mids and highs only.

Step 5: Limiting and Loudness

The final limiter catches peaks and sets the integrated loudness of your track. For Spotify and most streaming platforms, aim for -14 LUFS integrated. For louder, more aggressive genres, some engineers go to -9 or -10 LUFS — but you'll hit diminishing returns and lose dynamics quickly past that point. Set your true peak ceiling at -1dBTP to prevent inter-sample clipping.

The Faster Way: Let the AI Do It

Learning mastering takes months of ear training and experimentation. If you want a streaming-ready track now, Engineer Guy does all of the above automatically — EQ, compression, stereo enhancement, and limiting — calibrated specifically to your track's content. Upload your mix and download a master in under 60 seconds.

Ready to hear the difference?

Upload your track and get AI feedback in under 60 seconds.

Frequently Asked Questions

How loud should a mastered song be?

-14 LUFS integrated is the sweet spot for Spotify and Apple Music. Streaming platforms normalize tracks to this level anyway, so going louder just sacrifices dynamics without any benefit to the listener.

What's the difference between mixing and mastering?

Mixing balances individual tracks (vocals, drums, bass, instruments) within a song. Mastering takes the finished stereo mix and optimizes it for distribution — loudness, tonal balance, and format compatibility.

Can I master in the same DAW session I mixed in?

Technically yes, but it's bad practice. Ear fatigue from mixing makes it almost impossible to make objective mastering decisions. Export the mix, take a break, then master in a fresh session or use an AI tool.

Do I need expensive plugins to master a song?

No. A good EQ, a multiband compressor, and a transparent limiter are all you need. FabFilter Pro-Q3, Pro-MB, and Pro-L2 are industry standards, but free alternatives like TDR Nova and Limiter No6 can do the job. Or skip plugins entirely with Engineer Guy.

Should the master be louder than the mix?

Yes. The integrated LUFS of a properly mastered track will be louder than a raw mix — typically by 8–14dB. But 'louder' doesn't mean distorted. It means optimized. You should add loudness transparently, not by squashing everything flat.