to adjust audio. Use either the graphical controls in the Custom Setup view, or
adjust values in the Individual Parameters view.
Gate
Cuts off a signal when the level falls below the specified threshold. Use this control
to remove unwanted background signals in recordings, such as a background signal in a
voiceover. Set the gate to close whenever the speaker stops, thereby removing all other
sounds. The LED display colors indicate the gate’s mode: open (green), attack or release
(yellow), and closed (red). Use the following controls for Gate:
•
Threshold specifies the level (between –60 and 0 dB) that the incoming signal must
exceed to open the gate. If the signal level falls below this level, the gate closes, muting
the incoming signal.
•
Attack specifies the time the gate takes to open after the signal level exceeds the
threshold.
•
Release sets the time (between 50 and 500 milliseconds) the gate takes to close after
the signal level has fallen below the threshold.
•
Hold specifies the time (between 0.1 and 1000 milliseconds) the gate stays open after
the level has fallen below the threshold.
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Adobe Premiere Pro Help Applying Effects
Using Help | Contents | Index Back 281
Compressor
Balances the dynamic range to create a consistent level throughout the
duration of the clip by increasing the level of soft sounds and decreasing the level of loud
sounds. Use the following controls for Compressor:
•
Threshold sets the level (between –60 and 0 dB) that the signal must exceed to invoke
compression. Levels that fall below the threshold are unaffected.
•
Ratio sets the ratio by which compression is applied, up to 8:1. For example, if the ratio
is 5:1, and the input level increases by 5 dB, the output increases by only 1 dB.
•
Attack sets the time (between 0.1 and 100 milliseconds) that the compressor takes to
respond to a signal that exceeds the threshold.
•
Release specifies the time (between 10 and 500 milliseconds) it takes for the gain to
return to the original level when the signal falls below the threshold.
•
Auto calculates the release time based on the incoming signal.
•
MakeUp adjusts the compressor’s output level (between –6 and 0 dB) to account for
loss in gain caused by compression.
Expander
Reduces all signals below the specified threshold to the set ratio. The result is
similar to the gate control but is more subtle. Use the following controls with Expander:
•
Threshold specifies a level in which the signal must fall to activate the expander. Levels
that exceed the threshold are unaffected.
•
Ratio sets the rate at which signals are expanded, up to 5:1. For example, if the ratio is
5:1, a level decrease of 1 dB is expanded by 5 dB, resulting in a much faster decrease of
the signal.
Limiter
Reduces clipping in audio clips that contain peaks in the signal. For example, by
leveling out peaks that exceed 0 dB in an audio file, the overall level of the audio doesn’t
have to be reduced below 0 dB to avoid clipping. Use the following controls with Limiter:
•
Threshold specifies the maximum level of the signal, between –12 and 0 dB. All signals
that exceed the threshold are reduced to the same level as the threshold.
•
Release specifies the time (between 10 and 500 milliseconds) required for the gain to
return to the normal level after a clip occurs.
SoftClip reduces clipping similar to Limiter but doesn’t use hard limiting. This control adds
an edge to some signals to better define them within an overall mix.
EQ
The EQ effect acts as a
parametric equalizer
, meaning that it controls frequency,
