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Mix and Mastering — What Is It?

You often hear “mix,” “mastering,” “mix/master” — but what does it actually mean? This guide explains the difference and helps you understand what you need.


StageWhat Does It Do?When Do You Need It?
MixCombines all tracks into a cohesive wholeAlways after recording
MasteringAdds punch, clarity, and release-readinessBefore publication

Mixing is the process of combining all recorded tracks into one cohesive song.

  1. Balances volumes — vocals should be audible but not overpower the beat
  2. Pans — places sounds in stereo space (left-right)
  3. Equalizes (EQ) — corrects frequencies so nothing “clashes”
  4. Compresses — controls dynamics, evens out quiet and loud parts
  5. Adds effects — reverb, delay, chorus, saturation
  6. Automates — volume and effects change throughout the song

You have recorded vocals and a backing track (beat). The mix engineer:

  • Sets the vocal at the right level
  • Adds reverb so the voice isn’t “dry”
  • Equalizes so the vocal “cuts through” the beat
  • Compresses so quiet parts are audible
  • Automates volume in choruses

Result: Everything sounds like one cohesive track, not separate recordings played together.


Mastering is the final step before publication — but don’t underestimate it. This is often when a track truly “comes alive.” You work on a finished mix (one stereo file) or on stems — grouped tracks like DRUMS, BASS, INSTRUMENTS, VOCALS, VOCAL FX, BV. Stem mastering offers even more possibilities.

  1. Fresh ears — the mastering engineer hears your track for the first time and catches things you and the mixer missed after hours of work
  2. Professional monitoring — speakers worth tens of thousands in an acoustically treated room reveal problems invisible on headphones or home monitors
  3. Punch and energy — good mastering adds impact you feel in your chest. The kick starts hitting, the bass has weight
  4. Width and space — the track becomes “bigger,” instruments spread out, vocals push forward
  5. Clarity — everything becomes clearer, each element has its place
  6. Consistency across systems — sounds good in the car, on AirPods, in the club

What Specifically Does a Mastering Engineer Do?

Section titled “What Specifically Does a Mastering Engineer Do?”
  • Optimizes loudness for streaming (without destroying dynamics)
  • Corrects frequency balance (does the bass disappear on small speakers?)
  • Controls dynamics — compression and limiting
  • Adds analog character (saturation, tape emulation)
  • Checks mono compatibility
  • Prepares formats for distribution

You get a mix from the engineer — sounds good. After mastering:

  • The kick hits harder, you feel it in your body
  • Vocals are clearer and closer
  • Hi-hats have air, don’t scratch
  • Everything is louder but not “crushed”
  • Sounds just as good on headphones as on speakers

Clients often say mastering made more difference than they expected. Sometimes it’s subtle polishing, sometimes a real transformation — a good mastering engineer knows when a track needs just a gentle touch and when much more can be extracted from it.


AspectMixMastering
You work onMultiple tracks (multitrack)Stereo or stems
Scope of changesLarge — everything can be changedFinal touch, but noticeable
Work timeHours to daysHours
Can fixRecording problemsBalance, energy, width
GoalCoherence and balance of elementsPunch, clarity, release-readiness

If:

  • You want a demo to show friends
  • You’re sending a track to a label/A&R
  • Maximum loudness doesn’t matter to you

If:

  • You’re publishing on Spotify, Apple Music, YouTube
  • You want the track to sound professional and compete in the music market
  • You’re releasing a single, EP, or album

If:

  • You already have a finished mix (e.g., from another engineer)
  • The mix sounds good but needs finalization

ServicePrice
Mix/mastering of a trackfrom 500 PLN
Mastering onlyfrom 300 PLN
Vocal mix (to a ready beat)from 400 PLN

Full pricing: Pricing


No. Mastering works on finished stereo — if vocals are too quiet in the mix, mastering won’t fix that. You can only raise everything, but proportions remain. Stem mastering offers a bit more flexibility, but nothing replaces a well-done mix.

Not always. Streaming platforms (Spotify, Apple Music) normalize loudness. An over-compressed, “crushed” track will sound worse than a dynamic one.

These are two different processes. Often done by the same person, but requiring different skills and tools.


  1. You record — vocals, instruments
  2. You get a demo — premix, so you can hear how it sounds
  3. You order a mix — engineer works on the tracks
  4. You get a mix for approval — 2 revision rounds included
  5. You order mastering — finalization for publication
  6. You get the master — ready for distribution


Order Mix/Mastering | How to Prepare Files | Glossary