Adobe Premiere Pro CS6 - Manual (Page 374)

In the Effect Controls panel, Custom Setup for this effect shows Detected Crackles and Output monitors. The first shows the input signal with any
detected crackles. The second shows the output signal with the crackles removed.
Threshold Determines the detection level for the crackles. This control ranges from 0 to 100%.
Reduction Determines the amount by which the crackles will be reduced. This control ranges from 0 to 100%.
Efficiency meter This meter indicates the efficiency of the DeCrackler. The Threshold dial should be tweaked to get the maximum value. Please
be aware that the maximum will also be reached when the threshold is very low, but at this point the fundamental audio signal will be harmed.
Audition When selected, this control lets you hear only the sounds that will be removed. When the actual contents of the audio can be heard in
audition mode, this is a strong indication that the threshold is set too low. If the threshold is left unadjusted the audio signal will be harmed.
DeEsser effect
The DeEsser effect removes sibilance and other high frequency “SSS”-type sounds, which are often created when a narrator or vocalist
pronounces the letters “s” and “t.” This effect is available for 5.1, stereo, or mono clip.
Gain Specifies the amount of reduction applied to the “SSS” sound. The meter displays the amount of the reduction, in decibels.
Male and Female Specifies the gender of the narrator or vocalist. This option helps the effect to adapt to the difference in tone between
genders.
DeHummer effect
The DeHummer effect removes unwanted 50 Hz / 60-Hz hum from the audio. This effect is available for 5.1, stereo, or mono clip.
Reduction Specifies the amount of reduction to apply to the hum. High values may also cut necessary audio information in the low end.
Frequency Specifies the center frequency of the hum. Usually this will be 50 Hz in Europe and Japan, and 60 in the US and Canada. Often the
frequency of the hum is not static, but will vary by +/– 5 Hz. Click the 50 Hz or 60 Hz buttons to set the respective frequency.
Filter Specifies the number of filters to use to remove the hum. Hum is comprised not only of the fundamental frequencies of 50 or 60 Hz, but also
contain harmonics with frequencies that are multiples of the fundamental (100/110 Hz, 150/160 Hz, and such). Higher values cause greater CPU
usage. Adjusting this value determines the number of harmonic frequencies to filter. For example, if you choose 60 Hz as the Frequency value,
and choose 4# as the Filter value, the DeHummer filters the 60 Hz frequency along with three harmonic frequencies (120 Hz, 240 Hz, and 480
Hz), for a total of four frequencies filtered, hence the value of 4#. Higher values require more processing power.
Delay effect
The Delay effect adds an echo of the audio clip’s sound that plays after a specified amount of time. This effect is available for 5.1, stereo, or mono
clip.
Delay Specifies the amount of time before the echo plays. The maximum is 2 seconds.
Feedback Specifies a percentage of the delayed signal to be added back into the delay to create multiple decaying echoes.
Mix Controls the amount of echo.
DeNoiser effect
The DeNoiser effect automatically detects tape noise and removes it. Use this effect to remove noise from analog recordings, such as magnetic
tape recordings. This effect is available for 5.1, stereo, or mono clip.
Noisefloor Specifies the level (in decibels) of the noise floor as the clip plays.
Freeze Stops the noise floor estimation at the current value. Use this control to locate noise that drops in and out of a clip.
Reduction Specifies the amount of noise to remove within a range of –20 to 0 dB.
Offset Sets an offset value between the automatically detected noise floor and the value defined by the user. This is limited to a range between –
10 and +10 dB. Offset allows additional control when the automatic denoising is not sufficient.
Dynamics effect
The Dynamics effect provides a set of controls that can be combined or used independently to adjust audio. Use either the graphical controls in
the Custom Setup view, or adjust values in the Individual Parameters view. This effect is available for 5.1, stereo, or mono clips.
AutoGate 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 voice-over. 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.
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
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