Apple Soundtrack Pro 3 - Manual (Page 256)

The inserted noise can be white noise (emphasizing higher frequencies) or pink noise
(equal distribution of frequencies).
To choose the type of noise to insert
µ
In the Noise Generator dialog, choose the type of noise from the Waveform Type pop-up
menu.
To set the length of the inserted noise
1 In the Noise Generator dialog, choose the format you want to use from the Duration
pop-up menu.
2 In the Duration value slider, do one of the following:
• Click the left arrow to shorten the length of the inserted noise, or click the right arrow
to increase the length.
• Click the center of the value slider, then drag the slider that appears left or right to
change the length of inserted noise.
• Click the value in the value slider, then type a new value.
3 Click OK.
To set the volume level of the inserted noise
µ
In the Noise Generator dialog, drag the Volume slider left or right to set the noise level.
You can also type a level (in decibels) in the Volume field.
Inserting a Waveform
When you choose Process > Insert, then choose Waveform from the Insert submenu, the
Waveform Generator dialog appears. You can set the type of waveform to insert, set the
length of the inserted waveform, choose the format for setting the waveform length (any
of the Time Ruler Units formats), and set the volume of the inserted waveform.
The inserted waveform can be a sine, sawtooth, square, or triangle wave.
256 Chapter 9 Processing Audio Files