Autodesk 64006-051108-9001 User Guide - Page 209

Audio Tab 201 Dynamic Range Enable to modify the apparent volume of the audio, by defining the range between the loudest and quietest sound in the audio. Limit to 90% is often good for web audio. Choose Hotter to increase the apparent loudness of the audio. Choose Narrow Range to increase quiet sections and limit loud sections. Choose Custom to define a custom dynamic range. Minimum Amplitude controls how quiet sections will be modified; values greater than 0 increase the loudness of quiet sections. Maximum Amplitude controls how loud sections will be modified; values less than 100 decrease the volume of loud sections. Lookahead determines how fast transitions occur in the audio; larger values create smoother transitions, smaller values produce faster changes. Noise Gate Enable to insert silence in the audio track whenever the volume falls below a specified threshold for a specified time. One of the presets (Mild, Moderate, or Extreme) usually works well with typical material. Choose Custom to define a custom noise gate. Threshold controls the audio level under which the filter completely silences the audio track; higher values silence louder sections. Minimum Duration, measured in seconds, controls how long the audio must be quiet before the noise gate activates; very short values can cause the audio to become choppy. Notch Enable to remove a specific section of frequencies centred on the specified frequency. It is useful for eliminating specific noises, for example line noise. One of the presets (60 Hz Mild, 60 Hz Moderate, 50 Hz Mild, 50 Hz Moderate) usually works well with typical material. Choose Custom to define a custom notch. Center controls the centerpoint of the notch. Width controls the size of the section of frequencies on each side of the centerpoint. Reverb Enable to simulate the effect of the audio being played in a large room. This can give a richer quality and more pleasant sound to the audio track. One of the presets (Mild, Moderate, or Extreme) usually works well with typical material. Choose Custom to define a custom reverb. Decay controls how fast the reverb fades out; higher values simulate a larger room. Mix controls how much of the reverb signal is added to the original, unaltered signal; higher values produce a stronger reverb effect.