Mastering with ReaLimit in REAPER: A Practical Guide for Clean, Loud, and Dynamic Mixes
When it comes to mastering inside REAPER, ReaLimit is a clean, transparent limiter that can sit at the end of your mastering chain and do its job without adding unwanted coloration. If you want your tracks loud, polished, and ready for release while keeping the dynamics intact, this plug-in deserves a spot in your workflow.
Available for free, in Reaper.
In this article, you’ll learn:
- How each control in ReaLimit works and how changes affect your audio.
- Step-by-step methods for setting up a mastering limiter in REAPER.
- Practical tips for balancing loudness and dynamics.
- Real-world use cases for different musical scenarios.
Understanding ReaLimit’s Interface & Controls
ReaLimit Interface
The beauty of ReaLimit is in its simple but powerful parameter set. Let’s break them down one by one.
1. Threshold
What it does: Sets the point at which limiting begins.
Practical application:
- Lowering the Threshold causes more of your signal to be reduced, making the track louder (unless you have 'Constant Gain' engaged) but potentially less dynamic.
- Raising it means less limiting and more transient detail is preserved.
2. Brick Wall Ceiling
What it does: The absolute maximum output level allowed.
Practical application:
- Set to around -0.7 dB in mastering to prevent inter-sample peaks after conversion.
- Essential if you are targeting streaming platforms to avoid overs.
3. Constant Gain
What it does: Compensates for the volume changes caused by limiting so you can hear the effect, not the loudness difference.
Practical application:
- Turn it on while setting your threshold so you can focus on tonal and dynamic changes instead of being fooled by “louder sounds better.”
- Turn it off before you set your brick wall ceiling for final render.
4. True Peak Mode
What it does: Detects and limits inter-sample peaks that could cause distortion.
Practical application:
- Always use True Peak mode in mastering.
- This ensures playback devices don’t distort due to peaks above 0 dBFS that occur in the D/A conversion stage.
5. Release Time
What it does: Controls how quickly ReaLimit stops reducing gain after a peak.
Practical application:
- Short/fast releases (slider left): More punch and aggression, but can increase distortion.
- Long/slower releases (slider right): Smoother sound, better for transparent mastering but slightly less perceived loudness.
- A balanced release time combines punch with smoothness—critical for genres like rock or pop.
Release and Performance settings
6. Performance Settings
What it does: Choose between normal and high-quality processing.
Practical application:
- For mastering, always select High Quality.
- Use normal mode if your computer is choking because of CPU usage.
Step-by-Step Mastering Workflow with ReaLimit
- Insert ReaLimit at the end of your mastering chain.
Place it after EQ, bus compression, and any saturation/character plug-ins. - Enable True Peak mode for accuracy.
- Start with release time:
Setting The Release Time
- Push the threshold low so you can clearly hear limiting.
- Adjust release until you find a balance between punch and smoothness.
Setting The Threshold
- Use Constant Gain while adjusting threshold to evaluate tone and dynamics, not loudness.
- Aim for 2–4dB of gain reduction on loudest sections for clean mastering.
You can push harder for competitive loudness, but beware of over-compression. - Check LUFS meter readings:
- Common targets: -8 to -10 LUFS-I for louder, commercial masters for pop, country, rock. EDM can go as high as -5 LUFS-I. These are suggestions, not rules!
Common Use Cases for ReaLimit
1. Transparent Final Master Limiting
For acoustic, orchestral, jazz, or singer-songwriter genres where detail matters, keep reductions minimal (1–3dB) with slower release times for transparency.
2. Competitive Loudness for Streaming
Pop, EDM, or hip-hop tracks that need to compete with commercial releases may require LUFS of -5 to -9. Use moderate to fast release times for punch but stay mindful of distortion.
3. Peak Control in Mixing
ReaLimit can also sit on submix busses to catch rogue peaks before they hit the master bus. This is especially effective for managing transient-heavy instruments like snares or percussion. You might consider 'Normal" rather than "High Quality" processing if your CPU is struggling. Or raise the block size on your buffer.
Key Tips for Best Results
- Distribute dynamics control across the chain: Use light compression earlier rather than relying entirely on the limiter.
- Pre-tame extreme peaks: Consider using clippers or limiters on individual tracks (kick, snare, vocals) before the master to ease the limiter’s job.
- Trust your ears first, meters second: Loudness and reduction readings are guides, not hard rules.
- Workflow tip: Threshold, Brickwall Ceiling, and Release Time all have input boxes as well as sliders. It may be easier to type a value in, than use the slider -- especially for making small changes.
Wrap-Up
ReaLimit is a powerful yet straightforward mastering limiter that excels in transparency, control, and ease of use inside REAPER. By understanding each control: Threshold, Brick Wall Ceiling, Release, Constant Gain, and True Peak, you’ll be able to achieve professional loudness without sacrificing the life of your mix.
In short:
- Engage True Peak and High Quality settings for mastering.
- Use Constant Gain while setting up.
- Aim for balanced release times.
- Leave -0.7dB ceiling for safety (some folks recommend -1.0dB, others -0.3dB dBFS).
- Watch your LUFS-I level and avoid over-limiting.
Your Next Step:
Experiment with ReaLimit on your latest mix and see how small adjustments to release and threshold transform your sound. For deeper mastering workflows, explore multi-stage compression to feed your limiter an already controlled signal.
A Few Limiting Thoughts 🙂
IMHO, a mastering limiter is not the solution to your dynamics and loudness issues. It's the last polish, not some kind of magic elixir. If you send a wildly uncontrolled mix (in terms of dynamics) to your mastering limiter, you might not be able to get the mix squashed down enough to be competitively loud, without losing punch.
Control your dynamics in stages. No one stage will do that much.
BTW, competitive loudness is still a thing. Although streaming platforms such as Spotify may normalize everyone's mixes to about -14 LUFS-I, that's a playback standard, not a mix target. There are plenty of devices and situations in which that normalization will not be applied and your mix will sound like weak sauce if you send it at -14.
Also, Spotify's normalization is non-destructive. Send them a hotter mix and they're just turn it down -- there's no compression or limiting involved.
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