If you have searched this before, you have probably found three articles that contradict each other.
REAPER has everything required to produce a competitive master. What it does not have is a workflow that tells you the order to do things in, which is the part that actually matters.
Nothing below is theory for its own sake. Every number here is one you can check on a meter, and every step is one you can run on the next track you open.
Key takeaways
- REAPER can produce a commercial master with stock plugins.
- Master in a fresh project, not inside the mix session.
- Chain order: corrective EQ, compression, tonal EQ, saturation, imaging, limiter, dither.
- Export 24-bit and only dither when reducing to 16-bit.
Setting up a mastering session in REAPER
REAPER does not need a dedicated mastering mode to produce a competitive master. It needs a clean signal path, honest metering, and a chain in the right order.
- Create a new project rather than mastering inside the mix session. You want to hear the bounce, not the mix.
- Import the 24-bit mixdown onto a single track. No fades, no edits yet.
- Set the master fader to unity and leave it there. All gain changes happen inside the chain.
- Insert a loudness meter last in the chain so it reads the final output.
- Import a commercial reference track on a second channel and level-match it to your mix.
Tiny install, deep customisation, and a licence that costs less than most plugins is what REAPER is genuinely good at. Best suited to: engineers who want control over everything.
The chain order that works
Order is not arbitrary. Each stage assumes the one before it has already done its job.
| Stage | Purpose | Typical setting |
|---|---|---|
| Corrective EQ | Remove problems: rumble, resonances, harshness | High-pass at 20 to 30 Hz, narrow cuts only |
| Compression | Glue and control, not loudness | 2:1, 1 to 2 dB gain reduction, slow attack |
| Tonal EQ | Shape the overall balance | Broad shelves, under 1.5 dB |
| Saturation | Harmonic density and perceived loudness | Subtle. If you hear it as an effect, back it off |
| Stereo work | Width above the crossover only | Bass mono below 100 to 120 Hz |
| Limiter | Set the ceiling and reach the target | Ceiling -1 dBTP, 2 to 4 dB gain reduction maximum |
| Dither | Only when reducing bit depth | 24-bit to 16-bit only, last in chain |
Metering that tells you the truth
- A true-peak meter with oversampling. Sample peak lies to you about what happens after encoding.
- An integrated LUFS meter measuring the whole track, not a section.
- A correlation meter to catch phase problems before they reach mono playback.
- A spectrum analyser with a long average, not a fast one. You are judging balance, not transients.
Your ears make the decision. Meters stop you from making a decision that is objectively wrong.
Exporting a master that survives
- Export 24-bit WAV at the session sample rate for distribution.
- Only dither if you are reducing to 16-bit, and put it last.
- Leave the true peak ceiling at -1 dBTP so lossy encoding has room.
- Encode to AAC yourself and listen. That is what your audience gets.
- Keep the unlimited version. You will need it for a remaster, a sync, or a vinyl cut.
The mistakes that cost the most
These are not exotic. They are the five things that show up again and again in tracks that almost work.
- Judging at a different level each time. Loud always sounds better, so set a monitoring level and leave it.
- Solving a balance problem with a plugin. If the fader cannot fix the relationship, a compressor will only make the wrong balance more consistent.
- Working only on one system. A mix that only holds together on your monitors is not finished, it is calibrated to your room.
- Boosting where you should be cutting. Making something louder to beat a masking problem raises the whole noise floor of the arrangement.
- Never bypassing. If you have not compared against the unprocessed version in the last twenty minutes, you have lost your reference point.
Take a break every forty minutes. Ear fatigue does not announce itself, it just quietly moves your idea of what bright means.
Knowing when to stop
There is a point in every session where further work stops improving the record and starts merely changing it. Recognising that point is most of the skill.
- You are undoing changes as often as you are making them.
- You cannot articulate what the last move fixed.
- The reference no longer sounds obviously better in any specific way.
- You are adjusting things you would not notice as a listener.
Bounce it, sleep on it, and listen once in the morning on a system you did not use to make it. That single listen tells you more than another two hours ever will.
What MaestroNet does with this
MaestroNet analyses the source before it processes anything: spectral balance against a genre reference curve, crest factor, stereo correlation across frequency, transient density, and where the energy actually sits.
The targets move with the style. The chain does not. That matters, because a system that swaps in a different EQ curve regardless of what you sent will fight a mix that was already correct.
- Loudness targeting to the platform standard, measured integrated across the whole track.
- True peak limiting with oversampling, so the AAC encode stays clean.
- Bass management below the crossover, keeping the low end mono and centred.
- Tonal correction referenced to the selected style, applied in broad strokes rather than narrow ones.
What it will not do is decide that the second chorus should feel bigger than the first. That is an interpretive call, and it stays yours.
Frequently asked questions
Can I master professionally in REAPER?
Yes. REAPER has the metering, the routing and the stock processing required. The limiting factor is method and monitoring, not the software.
Should I master in the mix session?
No. Open a new project and import the bounce. Mastering inside the mix session tempts you to fix mix problems with mastering tools, which never works well.
Do I need third-party plugins?
No. Stock EQ, compression and limiting are sufficient. A good true-peak and LUFS meter is the one thing worth adding if the stock metering is weak.
What should I export?
24-bit WAV at the session sample rate, with a -1 dBTP ceiling. Only dither if you are producing a 16-bit version.
Hear it on your own track
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Related tools: AI Mastering · LUFS Meter and Audio Analyzer · True Peak Limiter
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