Apple Compressor 3 - Manual (Page 263)

• Alpha: This slider sets the watermark image opacity. Choose between 0 and 1. A value
of 0 makes the watermark image completely transparent, while a value of 1 makes it
completely opaque.
• Repeat checkbox: Used when you choose a clip as the watermark, this checkbox allows
you to have the watermark clip loop its playback. If you don’t select this checkbox, the
watermark clip plays until its end and then disappears.
• Choose button: Click this button to open the file selection dialog and select a stored
watermark movie or still image.
Audio Filters Tab
Compressor includes the following audio filters.
Important: The audio filters are not available when audio is set to “Pass-through” in
QuickTime settings. See About the QuickTime Movie Encoder Pane for more information.
Dynamic Range
Allows you to dynamically control a clip’s audio levels by enhancing the quieter parts
and lowering the louder parts. This is also referred to as audio level compression.
• Soften Above: Audio above this level is reduced to the level set by the Master Gain.
• Noise Threshold: Sets the level of what is considered noise. Audio at this level and above
is dynamically boosted to the level set by the Master Gain. Audio below this level is left
as is.
• Master Gain: Sets the average level of the dynamically compressed audio.
Peak Limiter
Sets the level of the loudest audio allowed in the clip.
• Gain (dB): Sets the level above which louder peaks are reduced.
263 Chapter 22 Adding Filters to a Setting