11.0

EFFECTS MENU 525
The violet-colored line is used for filtering the noise spectrum, which is expressed on the
display with the blue line.
Overlapping: The exactness of the algorithm can be selected here in several steps.
Processing times increase with increasing overlapping as the quality of the results
improves.
Resolution: This parameter allows you to set the rate (low, medium, or high) used by the
noise reduction algorithm. The higher the rate, the longer the algorithm will take to process.
You may wish to experiment with this parameter, since a higher rate does not always
guarantee the best results. For example, a low resolution often works best when applying
noise reduction to short percussive sounds and speech. Low-frequency sounds require
adequate resolution in the low-frequency range, and this can be achieved by setting this
parameter to at least 4096.
DeNoiser - Artifacts
For sound distortions with levels that reach or exceed that of the original signal, the
algorithm can leave behind a metallic chirping or twittering sound, the so-called "artifact"
noise. Its level is much further below that of the original distortion, usually at around -20 dB.
The ear is quite sensitive to this because of its synthetic character.
You can choose from many specialized options for removing artifacts. The parameters
described in the "artifact suppression" category can be used for this.
DeNoiser – Parameters
Artifact suppression
These settings suppress artifacts as they occur in broadband distortions of higher levels. If
you select a very high value, the quality of the results is reduced. For this reason, you
should select the value at which the artifacts are just about no longer audible. With
"uncritical" distortions, artifacts do not appear and, in this case, high settings would
produce poor results. If you're not sure, reset the values to zero.
Smooth attack: This parameter controls the attack when applying noise reduction. A higher
value will reduce artifacts, but alters the response time of the audio. Generally speaking,
this parameter is most effective for diminishing artifacts in musical tracks. In the case of
vocals or speech, higher values lead to less than optimal results.
Smooth release: This parameter controls the release when applying noise reduction. A
higher value will reduce artifacts, but alters the decay of the audio. Generally speaking, this
parameter is most effective for diminishing artifacts in percussive (instruments with short
decay) tracks. A compromise has to be found when aiming to reduce artifacts.
Static smoothing: This function smoothes out the corrected noise spectrum used
internally by the algorithm to remove noise. You will also be able to recognize from the
graphical display that the blue curve is smoothed. The artifacts are thus reduced. This
function usually leads to good results when applied to speech, vocals, or pop music using
high values. In the case of orchestral instruments, high value settings of this parameter can
cause unpleasant roughening of the sound.