2009

Table Of Contents
Out Ceiling knob and field: Sets the maximum output level, or ceiling. The signal will
not rise above this.
Output meters (to the right): Show output levels, allowing you to see the results of the
limiting process. The Margin field shows the highest output level. You can reset the
Margin field by clicking it.
Mode buttons (Extended Parameters area): Choose the type of peak smoothing:
OptFit: Limiting follows a linear curve, which allows signal peaks above 0 dB.
NoOver: Avoids distortion artifacts from the output hardware by ensuring that the
signal does not exceed 0 dB.
Lookahead field and slider (Extended Parameters area): Adjusts how far ahead the Adaptive
Limiter analyzes the file for peaks.
Remove DC checkbox (Extended Parameters area): Enable to activate a highpass filter
that removes direct current (DC) from the signal. DC can be introduced by lower-quality
audio hardware.
Compressor
The Compressor is designed to emulate the sound and response of a professional-level
analog (hardware) compressor. It tightens up your audio by reducing sounds that exceed
a certain threshold level, smoothing out the dynamics and increasing the overall
volume—the perceived loudness. Compression helps bring the key parts of a track or
mix into focus, while preventing softer parts from becoming inaudible. It is probably the
most versatile and widely used sound-shaping tool in mixing, next to EQ.
You can use the Compressor with individual tracks, including vocal, instrumental, and
effects tracks, as well as on the overall mix. Usually you insert the Compressor directly
into a channel strip.
90 Chapter 4 Dynamics Processors