Classroom in a book

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6
Soundbooth displays two views of your audio file: the common waveform view 
showing audio amplitudes near the top of the screen and a colorful spectral 
display view showing audio frequencies near the bottom of the screen. If you 
can’t see both views, drag the horizontal divider between the panels up or down 
so they are both visible. Give the frequency display more room.
7
Play the file again to hear the problems, the hum, and the cell phone ringing. 
You can drag the current-time indicator, much as you would in Adobe Premiere 
Pro, and use the playback controls at the bottom of the screen.
#
 Note:
The spectral 
display shows frequen-
cies over time rather 
than amplitudes over 
time. In this display, 
colors represent 
amplitude—dark blue 
for low amplitude and 
bright yellow for high 
amplitude.

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258
LESSON 13
Sweetening Your Sound and Mixing Audio
8
To remove the 60 Hz hum, click the Effects tab in the left-center panel. Click the 
Stereo Rack Preset pop-up menu, and choose Fix: Remove 60 Cycle Hum.
9
Play the file again, and hear the amazing difference.
10
The effect is not permanently applied to the file yet. To permanently apply this 
change, click the Apply to File button at the bottom of the Effects Rack.
11
To remove the cell phone sound, you need to use the spectral display. The 
ringing cell phone is not visible as a change in amplitude, so you can’t use the 
waveform display to locate this problem. However, if you zoom out so the whole 
file is visible, the cell phone rings are quite obvious in the spectral display as 
short horizontal dashes between 2 kHz and 3 kHz.
12
Position the current-time indicator over the first cell phone ring, and zoom in 
by pressing the equal sign key (=) on the keyboard or the plus sign (+) on the 
numeric keypad.

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ADOBE PREMIERE PRO CS5 CLASSROOM IN A BOOK