Mastering is the final audio step before your music goes to Spotify, Apple Music, download stores or physical formats. It takes your finished stereo mix and prepares it for release — loudness, tone, consistency and correct files.
This guide explains what mastering actually does, and whether you need it before you upload.
What mastering does (in plain language)
Think of your mix as a photograph. Mastering is the final grade — not rebuilding the scene, but making it look right on every screen.
A mastering engineer typically:
- Adjusts overall tonal balance (brightness, warmth, weight)
- Shapes dynamics for punch and consistent loudness
- Optimizes for streaming platforms (normalization-aware)
- Checks translation on different speakers
- Exports release-ready files (WAV, optional MP3/AAC)
- Aligns level and tone across an EP or album when needed
Mastering works on one stereo file — not individual stems.
What mastering does not do
Mastering is not:
- Fixing a vocal that is too quiet in the mix
- Separating kick and bass that clash
- Adding instruments or changing arrangement
- Replacing a poor recording
Those are mixing (or editing / tuning) jobs. If your balance is not right, start with mixing, not mastering alone.
Do you actually need mastering before release?
For almost any official release — yes. Even a strong mix benefits from mastering because:
- Streaming platforms expect material that translates after loudness normalization
- Earbuds, cars and phones expose problems a studio monitor might hide
- Final QC catches clicks, offsets or format issues
- Competitive loudness and tone in your genre — without destroying your mix’s dynamics
You likely need mastering if:
- You are releasing on Spotify, Apple Music, etc.
- You care how the track sounds outside your room
- This is a single, EP or album you are promoting
- Your mix is done but does not yet feel “finished” at release volume
Mastering alone may be enough if:
- You already have a professional or near-final mix
- Balance, vocal level and low end are already right
- You only need final loudness, polish and formats
You need mixing (maybe + mastering) if:
- Vocals are hard to hear on a phone
- Kick and bass fight or the low end is muddy
- Elements mask each other
- You only have stems, not a finished stereo mix
Mastering in the release workflow
Typical path:
- Produce the track
- Mix (balance all parts → stereo mix)
- Master (polish stereo mix → release files)
- Distribute via your aggregator
Some experienced artists mix well themselves and only book step 3. Most independent releases use mixing + mastering for the best result.
Bundle pricing when you book both: How much does mixing and mastering cost?.
How is mastering different from “making it louder”?
Loudness is one part of mastering — not the whole job.
Modern streaming turns very loud masters down — crushed mixes often sound smaller after upload. Good mastering aims for:
- Competitive perceived loudness in your genre
- Transient punch (drums, vocals still move)
- Clean peaks and codec-safe true peak
Read more: Mastering loudness explained.
What file do you send?
One stereo WAV with headroom — not stems.
Full spec: What files do you need for mastering?.
GigTunes mastering
- Real engineers, not one-click presets
- Revision rounds per tier
- Streaming-oriented delivery
- Workspace for files, notes and approvals
See mastering pricing · Book mastering