What are the key takeaways from this guide?

Mastering serves four purposes:. Before touching any controls, listen to the entire mix.. After mastering, check on multiple systems: studio monitors, headphones, car stereo, laptop speakers, and phone speaker.. ## Critical Listening Checks After mastering, check on multiple systems: studio monitors, headphones, car stereo, laptop speakers, and phone speaker.. Never process the low end (below 200 Hz) in the side channel — bass should remain centered..

Who is this guide for?

This guide is designed for beginner-level users and takes about 2 minutes to read.

How-To Beginner 2 min read 351 words

Audio Mastering Fundamentals: Preparing Mixes for Distribution

Mastering is the final creative step before audio is distributed — a process of subtle refinement that ensures a mix translates well across all playback systems. Understanding the fundamentals prevents over-processing.

Key Takeaways

Mastering serves four purposes:
Before touching any controls, listen to the entire mix.
After mastering, check on multiple systems: studio monitors, headphones, car stereo, laptop speakers, and phone speaker.
## Critical Listening Checks After mastering, check on multiple systems: studio monitors, headphones, car stereo, laptop speakers, and phone speaker.
Never process the low end (below 200 Hz) in the side channel — bass should remain centered.

Featured Tool

BPM Calculator

Try it Free

What Mastering Does

Mastering serves four purposes:

Tonal balance — Ensure the frequency spectrum is balanced (not too bass-heavy, not too bright)
Dynamic consistency — Even out the overall dynamics so quiet and loud passages are appropriately balanced
Loudness — Bring the level to the target loudness standard for the delivery platform
Translation — Ensure the audio sounds good on every playback system: earbuds, car speakers, laptop speakers, studio monitors

The Mastering Signal Chain

Step 1: Reference Listening

Before touching any controls, listen to the entire mix. Compare against 2-3 reference tracks in the same genre that are professionally mastered. Note specific differences: 'the low end feels thinner than the reference,' 'the vocals feel recessed compared to the reference.'

Step 2: EQ

Make broad, gentle adjustments (1-2 dB). Mastering EQ is about overall tonal balance, not surgical corrections (those belong in mixing). Common moves: high-pass at 20-30 Hz to remove subsonic content, gentle shelf boosts for 'air' above 10 kHz, gentle cuts in muddy regions (200-400 Hz).

Step 3: Compression

Glue compression with a slow attack (30+ ms), slow release (200+ ms), low ratio (1.5:1 to 2:1), and 1-3 dB of gain reduction. This subtly bonds the elements of the mix together without squashing transients.

Step 4: Stereo Enhancement

If the mix feels narrow, subtle mid-side EQ can widen the stereo image. Boost the side channel above 5 kHz for a sense of width. Never process the low end (below 200 Hz) in the side channel — bass should remain centered.

Step 5: Limiting

The final limiter sets the output ceiling (typically -1 dBTP) and brings the loudness to the target LUFS. Use 2-4 dB of limiting maximum. If more is needed, the mix is too quiet and should be turned up before the limiter.

Critical Listening Checks

After mastering, check on multiple systems: studio monitors, headphones, car stereo, laptop speakers, and phone speaker. If the bass disappears on small speakers, the low-end balance needs adjustment. If high frequencies are fatiguing on headphones, the top end is too aggressive.