4.1

Chapter 5 Advanced tasks 80
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Dynamic Range: Controls a clip’s audio levels by enhancing the quieter parts and lowering
the louder parts. This is also referred to as audio level compression. The Dynamic Range eect
contains the following properties:
•
Soften above: Drag the slider to set the level at which audio is reduced (softened) to the level
set by the “Master gain” control (described below). (You can also double-click the value and
type a new value.)
•
Noise threshold: Drag the slider to set the level at which the eect is applied. (You can also
double-click the value and type a new value.) Audio at and above the noise threshold is
dynamically boosted to the level set by the “Master gain” control (described below), and
audio below the noise threshold is not modied.
•
Master gain: Drag the slider to set the average level of the dynamically compressed audio.
(You can also double-click the value and type a new value.)
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Fade In/Out: Adds an audio fade-in eect at the beginning of the clip and a fade-out at the end
of the clip. The Fade In/Fade Out lter contains the following properties:
•
Fade in duration: Enter a value in the text eld or move the slider to set the length of the
fade in seconds.
•
Fade out duration: Enter a value in the text eld or move the slider to set the length of the
fade out in seconds.
•
Fade in gain: Drag the slider to set the value between –100.0 (silence) and 0.0 (the audio’s
volume) to dene the audio volume at which to start the fade in. (You can also double-click
the value and type a new value.)
•
Fade out gain: Drag the slider to set the value between –100.0 (silence) and 0.0 (the audio’s
volume) to dene the audio volume at which to start the fade out. (You can also double-
click the value and type a new value.)
•
Peak Limiter: Sets the level of the loudest audio allowed in the clip. Drag the Gain slider to set
the level above which louder peaks are reduced. (You can also double-click the value and type
a new value.)
Add metadata
You can add metadata to your transcoded le in the form of job annotations and
closed-caption les.
Add annotations to a media le
Annotations are output with les transcoded using Apple Devices, MP3, and QuickTime settings.
You can annotate a source media le with information that is important for your workow or
for the person viewing your output le. You can add any of the annotation elds provided in
Compressor, or import metadata that’s used in another media le (like a QuickTime movie).
1 In the batch area, select the job that contains the source le to which you want to add metadata.
Tip: To select the job, rather than an output row under the job, click the source lename at the
top of the job area.
2 In the Metadata area of the Job inspector, do one of the following:
•
Choose an annotation type from the Add Job Annotation pop-up menu.
•
Choose Import from the Add Job Annotation pop-up menu, select a media le that contains
annotations that you want to add to your source le, and then click Open.
3 Type a description in the text eld (or in multiple text elds) for the annotation type you chose.
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