Short answer
Mixing shapes the relationships among individual audio tracks; mastering finishes the combined recording for distribution. In the stereo music workflow described here, mixing produces the file that mastering then refines. The distinction is primarily about scope and purpose, not an exclusive set of effects. 1 2
On this page
At a glance
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| Question | Mixing | Mastering |
|---|---|---|
| What is being worked on? | Separate vocal, drum, guitar, and other tracks | The combined stereo recording |
| Main purpose? | Balance and blend the elements | Finalize the overall sound for distribution |
| Typical adjustments? | Levels, panning, EQ, compression, effects | Overall level, frequency balance, loudness |
| Where in this workflow? | Before the stereo handoff | After the mix |
These are the sources’ conventional music-production roles, not rules for every possible workflow. 1 2
What each thing is
A mix is where separate musical elements become a coherent recording: the mixer can change their relative prominence and treatment. Mastering takes that combined result as its starting point. Its concern is the finished recording’s overall presentation, including loudness and frequency balance, rather than rebuilding the relationships among isolated performances. 1 2
Key differences
The important difference is the reach of an adjustment. In mixing, a change can target one available track. In stereo mastering, a change may influence several musical elements together. That makes mastering a balancing exercise: improving one part of the combined sound can worsen another. The sources consequently describe mastering adjustments as often subtle. 2
How to tell them apart
Ask what material is available and what the adjustment is intended to accomplish. Balancing separate vocal and drum tracks points to mixing; finalizing their combined stereo recording points to mastering. This is a practical identification rule for the described workflow, not a universal test. The presence of an EQ or compressor alone does not settle the label. 1 2
Where they overlap
Both disciplines shape tone and perceived balance, and both can use EQ. Effects are not completely exclusive either: Berklee’s account allows occasional reverb or slight distortion during mastering. Shared processing does not erase the distinction; the same kind of tool can serve an individual element in a mix or the overall finished recording. 1 2
Edge cases
Two hypothetical examples illustrate the boundary. First, lowering a separately available vocal so it sits better against the drums is mixing. Second, adjusting the overall frequency balance of the rendered stereo song before distribution is mastering. If that second change also alters the guitars, it illustrates mastering’s coupled tradeoffs rather than a separate guitar-mixing operation. 1 2
Why the distinction exists
The stereo handoff separates two kinds of attention: arranging the internal balance of the music and evaluating the combined result as a finished recording. Mastering adds a final perspective on polish, loudness, and playback suitability after those internal relationships have been established. This division explains the sequence without requiring different people to perform the two roles. 1 2
Common misconceptions
Mastering is not simply making a song as loud as possible: iZotope discusses loudness in relation to comparable music and avoiding excessive distortion. Nor does mixing require hundreds of tracks; Berklee’s large-session example illustrates separate elements, not a minimum count. Finally, mastering a stereo file does not provide the same independent control over its instruments as mixing does. 1 2
Examples
Hypothetical mixing case: adjusting an isolated lead vocal against separate drums changes the internal balance. Hypothetical mastering case: refining the loudness of the completed stereo song changes its finished presentation. These examples apply the sources’ distinction between individual-track work and final stereo-file work. 1 2