Limiter
From TANGOWIKI-TITAF
Limiter
A limiter is a special type of compressor designed to prevent audio from exceeding a certain maximum level. It is typically used to avoid distortion or clipping.
How It Works
A limiter operates like a compressor but with a very high ratio (typically ∞:1). That means once the signal hits the threshold, it cannot go any higher, regardless of how strong the input is.
Key Parameters
- Threshold
- The level where limiting begins.
- Attack
- How quickly limiting engages after the threshold is exceeded. Often extremely fast (1–10 ms or less).
- Release
- How quickly limiting disengages after the signal drops below the threshold.
- Margin / Output Ceiling
- Maximum output level allowed (e.g., -0.1 dB to avoid inter-sample peaks).
Use Cases
- Preventing clipping in mastering
- Controlling final peaks in a mix
- Broadcast and podcast audio normalization
- Live sound safety limit
Limiter vs. Compressor
| Feature | Compressor | Limiter |
|---|---|---|
| Ratio | Variable (e.g., 2:1, 4:1) | Very high (e.g., ∞:1) |
| Function | Controls dynamics | Hard ceiling |
| Use | General control | Peak protection |