Apple Soundtrack Pro - Manual (Page 93)

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Working in the Timeline
The Timeline is where you arrange audio clips to
build your soundtrack. You can also adjust volume
and panning, add effects, and edit envelopes to
control automation.
The Timeline displays a visual representation of a project, showing the point in time
when audio clips start playing and their duration. You control when and how long clips
play by moving and resizing them in the Timeline.
The Timeline is arranged in three sets of horizontal rows: tracks, busses, and outputs.
You add audio clips to tracks, create submixes using busses, and send audio to physical
output devices using outputs. For information about working with tracks, busses, and
outputs, see “
Tracks, Busses, and Outputs ” on page 90.
The Timeline also displays vertical gridlines that make it easy to position clips precisely
in time. The gridlines correspond to the divisions of time in the Time ruler. The units of
time the gridlines display change depending on the time format and the current
zoom level.