Graphics Reference
In-Depth Information
quency slider to 2160 Khz to set the frequency that we want to reduce and drag the Peak 1 Gain to −16 to
make the reduction (a positive value would increase this frequency).
2.
As you can see from the shape displayed on the Channel EQ's interface, the reduction covers a broad
range of frequencies. The bandwidth (or Q) needs to be narrower so that we eliminate only the buzzing
sound and don't affect the performers' voices. To do this, set the Peak 1 Q-Factor to 6 in the Inspector's
Channel EQ settings. This zones in on just the frequency we want and leaves the surrounding frequencies
unaffected (see Figure 13.6). Playback Scene 17 Slate 31 Take 2, and turn the Channel EQ on and off in the
Inspector to compare the difference.
Figure 13.6
Removing an unwanted frequency in the audio.
We still have a lot of background noise on the clip's audio, which will be very difficult to remove completely
without affecting the tonality of the actor's voices. However, let's see if we can reduce it to an acceptable level.
We'll use Final Cut Pro's Expander plug-in to help us. An expander is similar to a compressor, except instead of
reducing an audio clip's dynamics, an expander increases the dynamic range. This has the effect of pushing
background noise further into the background and making the dialogue louder and more pronounced.
1.
Open the Effects Browser and type
Expander
into the search field. Select Scene 17 Slate 31 Take 2 in
the Timeline, and double-click the Expander plug-in in the Effects Browser to apply it to the clip.
2.
Open the Inspector and select the Audio tab. Under Effects, you'll find the Expander settings for the clip.
Choose High Expansion from the Preset drop-down menu and click the EQ button to bring up the plug-in's
interface (see Figure 13.7).
