Mixing vs Mastering: What's the Difference?
Updated October 2026 · by Loopin
"Mixing" and "mastering" get used interchangeably, but they're two different jobs. Getting the distinction right is the difference between a track that sounds amateur and one that sounds finished, and it tells you which problems to fix where.
What mixing does
Mixing works on the individual tracks inside a song — vocals, drums, bass, synths. The mixer balances levels, pans instruments across the stereo field, carves space with EQ, controls each part with compression and adds effects like reverb and delay. The output of mixing is a single stereo file: the mixdown.
Because the mixer can reach every part separately, mixing is where you fix relationships: a vocal that disappears in the chorus, a kick and bass that blur together, a guitar that masks the lyrics, a reverb that washes out the verse.
What mastering does
Mastering works on that finished stereo file as a whole. It balances the overall tone, controls the dynamics so quiet and loud sections sit together, sets the stereo width, raises the loudness to a level that suits streaming, and keeps true peak low enough that nothing clips on playback. Mastering makes the song translate everywhere — earbuds, car, club — and sound consistent next to commercial releases.
On an EP or album, mastering also makes the songs belong together: similar loudness, similar tonal balance, and sensible gaps and fades between tracks.
Side by side
| Mixing | Mastering | |
|---|---|---|
| Works on | Every track separately | The finished stereo file |
| Main goal | Balance the parts | Make the whole translate and sit at the right loudness |
| Typical fixes | Buried vocal, muddy low end, clashing parts | Overall tone, loudness, peaks, consistency across a release |
| Output | Stereo mixdown with headroom | Release-ready master |
| Time | Hours to days | Minutes to an hour per song |
The order
Mix first, master last. You can't master your way out of a bad mix — if the vocal is buried or the low end is muddy, that's a mixing fix. Master only when the mix sounds right on its own and has a little headroom (peaks around −3 to −6 dBFS, no limiter on the master bus). The step-by-step mastering guide covers how to bounce for it.
Which problems belong where?
- The vocal is too quiet in one section: mixing. Mastering moves everything at once, so it cannot lift one part.
- The whole song is a little dull or a little harsh: mastering can handle a gentle overall tilt. If one instrument is the cause, fix it in the mix.
- The song is quieter than other releases: mastering. That is its job, and the free LUFS meter shows exactly how far off you are.
- It distorts on phones after upload: usually true peak. Mastering with a safe ceiling (about −1 dBTP, or −2 dBTP for loud masters) fixes it. See what is LUFS and true peak.
- The kick and bass fight: mixing. A master will make the fight louder.
A useful test: run a rough mix through a master early. If the same problem shows up on every feel, it is in the mix.
Do I need both?
Yes — even a great mix benefits from mastering, and a loud master can't fix a weak mix. The good news: while mixing takes skill and time, mastering can be done in seconds with the right tool. Loopin Mastering listens to your whole mix first, then sets tone, punch, width and loudness to suit it, free and in your browser.
Doing this every week? See mastering for producers, or mastering for engineers if you mix for clients and want a quick reference master to send with your mix.
Try it now: open the free Loopin Mastering tool — drop in an MP3 or WAV, pick a feel, and download a streaming-ready master. Nothing leaves your device.
Frequently asked questions
Is mastering just making the song louder?
Loudness is part of it, but mastering also balances overall tone, controls dynamics and keeps peaks safe, so the song sounds finished and consistent on every system.
Can I mix and master in the same session?
You can, but it is easier to bounce the mix and master it as a separate step. You hear the song fresh and you avoid mixing into a limiter.
Should I put a limiter on my mix before mastering?
No. Take it off and leave a few dB of headroom. A limiter on the mix hides problems that mastering then makes louder.
Can mastering fix a bad mix?
Not really. It can tidy the overall tone and level, but it cannot rebalance individual parts. Fix balance problems in the mix.