Editing, mixing and mastering aren't the same job
- Editing is cutting and arranging: removing dead air, rearranging sections, dropping a bad take.
- Mixing is balancing what's already there, like levelling speakers against each other or blending in music and sound effects.
- Mastering is the final pass that gets the whole episode to a consistent, delivery-ready standard: noise cleaned up, loudness set to a target, peaks kept safe.
A lot of podcasters do the first two and skip the third, assuming it's a music-industry step that doesn't apply to talking. It does; it's just a much smaller job for spoken word than it is for a song.
What mastering actually does for spoken word
No brightening EQ curves or elaborate compression chains, just three practical things: cleaning up whatever noise is left after editing, setting the whole episode to a loudness target that matches what platforms expect, and making sure the loudest moment never runs out of headroom. Small, mechanical, and the difference between a show that sounds finished and one that sounds like a recording.
Two simple tips make the whole job easier: keep your mic gain settings at a consistent level from session to session, and use a limiter so the whole episode lands on one loudness target with a decibel of true peak headroom left. Apple Podcasts, for instance, recommends about -16 dB LKFS with true peaks no higher than -1 dBFS, and a spoken-word master in that region travels well.
Do you need it on every episode?
If you publish to more than one platform, yes. The major services all sit in a similar loudness region, whether they publish a recommendation or simply normalise playback in their own way, and an unmastered file is rarely anywhere near it. Consistency matters more than any single episode being "good enough": a listener who reaches for the volume dial on episode 12 after 11 episodes at a comfortable level notices that far more than they'd notice steady, mediocre audio throughout. What each platform actually asks for.
Signs your show needs it
- Listeners mention needing to adjust the volume mid-episode.
- Episodes sound noticeably louder or quieter than each other.
- Guest audio sits at a different level than your own.
- You've never actually checked a loudness number before publishing.
Mastering every episode without touching a limiter
Optivox's mastering step covers all three: noise cleanup proportionate to what's in the file, speaker balancing, and loudness normalisation to a broadcast-standard target with true peak headroom preserved. It's the same result you'd get from a manual mastering pass, run automatically on every upload.