4.5

144Compressor User Guide
Audio effects in Compressor
The Add Audio Effect pop-up menu in the Audio inspector contains the following effects:
Note: Audio effects are not available in some settings when the “Copy audio tracks from
source” checkbox is selected in the Audio inspector.
• Apple: AUGraphicEQ: Configures a wide variety of frequencies throughout the audible
frequency range. Click the Options button to open the graphic equalizer window, then
choose either a 31-band version or a 10-band version from the pop-up menu at
the bottom.
Adjust frequencies by doing any of the following:
• Drag a slider to adjust the level of a frequency band.
• Select a frequency slider and then type a number in the dB field (in the lower-right
corner of the graphic equalizer window).
• Click the Flatten EQ button to set all bands to a 0.0 dB value.
• Drag to select multiple bands and then adjust the group.
• Hold down the Control key while dragging across the bands to “draw” an
equalization curve.
• 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 effect 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 “Overall gain” control (described below).
• Noise threshold: Drag the slider to set the level at which the effect is applied. Audio
at and above the noise threshold is dynamically boosted to the level set by the
“Overall gain” control (described below), and audio below the noise threshold is not
modified.
• Overall gain: Drag the slider to set the average level of the dynamically
compressed audio.