User Manual

WAVELAB
Plug-in Processor Reference 33 – 773
The figure below shows the signal flow:
The solid line represents the actual audio signal, while the dotted lines represent control
signals
The signal is continuously analyzed by the first module in the chain, to es-
timate the noise floor at any given time. This is sufficient when the noise
level is constant or modulates slowly. When the noise level varies rapidly,
the Ambience and Transient analyses help adjust the response of the
noise reduction unit, allowing transient-rich material to maintain its liveli-
ness and natural ambience.
• When you process audio in DeNoiser, the plug-in will need a short time
(less than a second) to analyze the material and set its internal parameters.
Since you would not want to include this short “startup sequence” in the final result, you
should make it a habit to first play back a short section of the audio, thereby letting De-
Noiser “learn” the noisefloor, and then stop and start over again from the beginning. The
plug-in then remembers the settings internally.
The Noisefloor Display
The display to the left in the DeNoiser window is crucial when making set-
tings. It contains the following three elements:
• The dark green spectral graph.
This shows the spectrum of the audio currently being played back. The horizontal axis
shows the frequency (linear scale). The low frequencies are visible on the left side, the high
ones on the right side. The vertical axis shows the signal amplitudes, thus the level (dis-
played as a logarithmic dB scale).
• The yellow line.
This is a spectral estimation of the noise floor. The average of this value is shown numeri-
cally below the display.
Noise
Reduction
Noise Floor Ambient
Analysis
Transient
Analysis
Input Output
Level
Noise Reduction
Ambience