Apple Soundtrack Pro - Manual (Page 149)

Chapter 7 Working in the Waveform Editor 149
Choosing the Sample Units in the Waveform Display
Along the left edge of the waveform display is a scale of sample units for the audio file.
You can set this scale to any of the following sample units:
 Sample Value
 Normalized
 Percent
 Decibels
To set the sample units in the waveform display, do one of the following:
m Choose View > Time Ruler Units, then choose a format from the submenu.
m Control-click along the left edge of the waveform display where the sample units
appear, then choose the sample units you want from the shortcut menu.
Zooming In and Out in the Waveform Editor
You can zoom in on a specific part of an audio file to make precise edits and perform
other tasks.
To zoom in or out, do one of the following:
m Drag the Zoom control left to zoom in for a closer view, or drag right to zoom out for a
wider view.
m Choose View > Zoom In to zoom in one level.
m Choose View > Zoom Out to zoom out one level.
If you have a mouse with a scrollwheel connected to your computer, you can set
Soundtrack Pro to zoom in or out when you move the scrollwheel. You can select part
of the audio file and zoom in on the selected area, zoom in to see individual samples in
the waveform, or zoom out to peaks.
To set Soundtrack Pro to zoom the waveform display when you move the
scrollwheel:
1 Choose Soundtrack Pro > Preferences.
2 If the General Preferences pane is not visible, click the General button.
3 In the Timeline section of the General Preferences pane, choose “Zooms at playhead”
from the Scrollwheel pop-up menu.
To zoom in or out using a scrollwheel:
m Move the scrollwheel up to zoom in, or move it down to zoom out.
To zoom in on a selection:
1 In the waveform display, select the area you want to zoom in on.
2 Choose View > Zoom to Selection.