“Brick Wall Limiter…”
A vastly improved peak limiter.
As the name suggests, this is a “brick wall” lookahead limiter.
What’s it for?
You want to make a recording 6 dB louder, but there’s only 2 dB headroom above some of the highest peaks - this is the plug-in for you.
How to use it
Set the amount of amplification that you want to apply (per channel) and press OK.
The amplification will be applied but peaks will not exceed 0 dB (no clipping).
The “Hold” control can normally be left at the default 10 ms.
Will it distort?
Yes you can overdo it. 
If you push the effect hard enough you may notice some “weirdness” to the sound due to the gain changing rapidly, but there is negligible harmonic distortion.
What’s the Hold setting for?
The Hold control tells the limiter to keep the gain down at the “limited” level for a minimum length of time before allowing it to rise back up to the normal level.
If there is very low and loud bass notes, the limiter may tend to distort the shape of the waveform as it compresses the peaks of single wave cycles. To avoid such distortion, the Hold setting may be increased, so ensuring that the gain does not change with each cycle of the waveform.
The Hold setting should ideally be as short as possible, but must be greater than half a cycle period of loud low frequencies. 10 ms is good down to 50 Hz. 25 ms is adequate down to 20 Hz. Unless the sound being processed has very heavy low bass, the default setting is likely to work well.
brickwall.ny (1.86 KB)