Mastering Basics
Loudness & the Limiter
A limiter is an extreme compressor that prevents any signal from exceeding a set ceiling, allowing a track's overall loudness to be raised significantly without clipping — the primary tool for competitive streaming loudness.
LUFS & Streaming Platform Targets
Streaming platforms (Spotify, Apple Music) normalize loudness to roughly -14 LUFS integrated — mastering significantly louder than this provides no audible benefit since the platform turns it back down, and can even reduce quality through excessive limiting.
Release Preparation
File Formats & Metadata
Export a final WAV master at the correct sample rate and bit depth, and correctly fill in metadata (track title, artist, genre, artwork) required by distribution platforms before a track can be properly released.
Distribution Basics
Services like DistroKid, TuneCore, or CD Baby deliver a finished, mastered track to Spotify, Apple Music, and other platforms for a fee or subscription — understand the basic process even if you don't release commercially yet.
The Mastered, Release-Ready Track
Master your Phase 3 mixed track to approximately -14 LUFS integrated loudness using a limiter, export a final WAV file at correct specifications, and complete all metadata fields required for a hypothetical distribution submission.
Success criteria: The mastered track measures within 1-2 LUFS of the -14 target when checked with a loudness meter. The limiter is not so aggressive that it introduces audible pumping or distortion. The exported file uses correct sample rate and bit depth, and all metadata fields (title, artist, genre) are complete.
Phase 4 Practice Exercises
12 exercises to build skill through direct application.
Limiter Threshold Practice
Apply a limiter to a mixed track, adjusting the ceiling and input gain to find the point just before audible distortion begins.
- Limiter calibration
- Loudness maximization
- Distortion threshold awareness
LUFS Measurement Drill
Use a loudness meter to measure 3 of your own tracks and 2 professional reference tracks, comparing all 5 LUFS readings.
- LUFS measurement skill
- Loudness benchmarking
- Meter-based mastering
Over-Limiting Comparison
Master the same track at -14 LUFS and again at -6 LUFS (over-limited), comparing audible pumping and distortion artifacts.
- Over-limiting awareness
- Quality vs loudness tradeoff
- Critical mastering judgment
Reference Track A/B Mastering
Master your track while switching back and forth to a professional reference track at matched loudness, comparing tonal balance.
- Reference-based mastering
- Loudness-matched comparison
- Tonal balance assessment
Sample Rate & Bit Depth Export
Export the same master at 3 different sample rate/bit depth combinations, checking the resulting file sizes and specifications.
- Export specification knowledge
- Technical format understanding
- Delivery preparation
Metadata Completion Drill
Fill in complete metadata (title, artist, genre, release date, artwork placeholder) for your milestone track in your DAW's export dialog.
- Metadata completion
- Release preparation detail
- Distribution readiness
Distribution Service Research
Research and compare 2 music distribution services (DistroKid, TuneCore), noting pricing and platform reach differences.
- Distribution knowledge
- Service comparison
- Practical release planning
Full Loudness Chain Test
Apply the complete mastering chain (EQ, compression, limiter) to a track and verify LUFS, true peak, and no clipping simultaneously.
- Full mastering chain
- Multi-metric verification
- Comprehensive technical check
Cross-Device Playback Check
Play your mastered track on 3 different playback systems (phone speaker, headphones, car/laptop) checking it translates well across all.
- Cross-device translation
- Real-world playback testing
- Mix and master validation
True Peak Verification
Check your master's true peak (not just sample peak) stays below 0dB to avoid inter-sample clipping on lossy formats.
- True peak awareness
- Inter-sample clipping prevention
- Advanced technical mastering
Full Master Export Run
Export the complete final master file at correct specifications, immediately re-importing it to verify no export errors occurred.
- Export verification
- Quality control process
- Final delivery confidence
Milestone Mastered Track Dress Rehearsal
Complete the full milestone mastering and metadata process exactly as it will be assessed, on your finished track.
- Performance readiness
- Full milestone simulation
- Capstone release preparation