Mastering turns a collection of songs into a record by making them belong together in tone, volume, and timing

The concise industry definition: mastering is the process of turning a collection of songs into a record by making them sound like they belong together in tone, volume, and timing (spacing between songs). This three-part test—tonal consistency, level matching, and appropriate song spacing—captures the core deliverables of a mastering session.

Examples

If one song was mixed with a bright EQ and another with a dull EQ, the mastering engineer applies corrective EQ so both sit in the same tonal world. Spreads are adjusted so the transitions between tracks feel musically paced.

Assessment

What three dimensions must the mastering engineer unify across all songs on an album?