Spectral noise reduction effect, Swap channels effect, Treble effect – Adobe Premiere Pro CS4 User Manual
Page 345: Volume effect, Audio crossfade transitions, Constant gain transition
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USING ADOBE PREMIERE PRO CS4
Effects and transitions
Last updated 11/6/2011
Hi Damp
Specifies the amount of dampening of high frequencies (in decibels). Low settings make the reverb sound
softer.
Mix
Controls the amount of reverb.
Spectral Noise Reduction effect
The Spectral Noise Reduction algorithm uses three notch filter banks to remove tonal disturbances from audio signals.
It can help eliminate noises from original footage, such as buzz and whistling tones.
Freq (1-3)
Determines the center frequency of each of the notch filters.
Reduction (1-3)
Sets the input gain level at which the color red appears in the meter for a given track.
Filter (1-3)
Activates the corresponding filter bank.
MaxLevel
Determines the gain reduction of each notch filter, thus controlling the amount of noise removed from the
signal.
CursorMode
Activates the adjustment of the filter frequency by the cursor.
Swap Channels effect
The Swap Channels effect switches the placement of the left and right channel information. Apply to stereo clips only.
Treble effect
The Treble effects lets you increase or decrease higher frequencies (4000 Hz and above). The Boost control specifies
the amount, measured in decibels, to increase or decrease. This effect is available for 5.1, stereo, or mono clips.
Volume effect
Use the Volume effect in place of the Fixed Volume effect if you want to render Volume before other Standard effects.
The Volume effect creates an envelope for a clip so that you can increase the audio level without clipping. Clipping
occurs when the signal exceeds the dynamic range that’s acceptable for your hardware, often resulting in distorted
audio. Positive values indicate an increase in volume; negative values indicate a decrease in volume. The Volume effect
is available for clips only in 5.1, stereo, or mono tracks.
More Help topics
Audio crossfade transitions
You can use audio crossfade transitions to fade in or fade out audio, as well as to crossfade between clips. For
information about using audio transitions, see “
Constant Gain transition
The Constant Gain crossfade changes audio at a constant rate in and out as it transitions between clips. This crossfade
can sometimes sound abrupt.