Selecting All or Parts of an Audio File

When you apply an action to an audio file in the File Editor, the action is applied to the entire file unless you select part of the file. You can select different parts of the audio file and apply different actions to each selection.

To select part of an audio file
  • In the waveform display, drag horizontally across the part of the waveform you want to select.

    Figure. File Editor showing a selected area.

Some actions can only be applied to a selection. The selection can contain the entire audio file.

To select the entire audio file
  • Choose Edit > Select All.

You can select one channel (left or right) of a stereo audio file and apply actions to only the selected channel. You can also select only part of one channel.

If you have selected part of an audio file in the File Editor tab, you can edit the selection to the multitrack Timeline. For more information, see Using the File Editor to Add Part of a File to the Timeline.

To select the left channel of an audio file
  1. Move the pointer near the upper edge of the waveform display.

    The pointer changes to the letter “L.”

  2. Do one of the following:

    • Double-click in the upper part of the waveform display to select the entire left channel.

    • Drag the pointer to select the part of the left channel you want to work with.

      As you drag, the left (upper) channel of the audio file becomes darker in the waveform display.

      Figure. File Editor showing part of the left channel selected.
To select the right channel of an audio file
  1. Move the pointer near the lower edge of the waveform display.

    The pointer changes to the letter “R.”

  2. Do one of the following:

    • Double-click in the lower part of the waveform display to select the entire right channel.

    • Drag the pointer to select the part of the right channel with which you want to work.

      As you drag, the right (lower) channel of the audio file becomes darker in the waveform display.

      Figure. File Editor showing part of the right channel selected.

If you have added markers to an audio file project, you can select the area between two markers.

To select the area between two markers in the File Editor project view
  • Double-click the waveform display in the area between the two markers.

    If there are additional markers, you can expand the selection by dragging toward them.

To select the entire contents of one or more channels
  1. Click the File Editor tab or the File Editor project view to make it the active window.

  2. Choose Edit > Select > Across Channels (or press Shift-T).

If there is an existing selection, it is extended across the entire duration of the file (but only for the currently selected channels). If there is not an existing selection, Soundtrack Pro creates a new selection across active channels for the entire length of the file.

To select the partial contents of one or more channels
  1. Click the File Editor tab or the File Editor project view to make it the active window.

  2. Position the playhead.

  3. Do one of the following:

    • To select everything to the right of the playhead in the active channels: Choose Edit > Select > Forward (or press Shift-End).
    • To select everything to the left of the playhead in the active channels: Choose Edit > Select > Backward (or press Shift-Home).

If there is an existing selection, the selection is extended to the end of the audio file (for Forward) or to the beginning of the audio file (for Backward).

If there is not an existing selection, Soundtrack Pro creates a new selection across active channels from the end of the audio file (for Forward) or from the beginning of the audio file (for Backward).

Note: If you hold down the Option key, the menu items will read Select > All Forward and Select > All Backward, and behave the same as described earlier except the selection will be across all channels instead of just the selected channels.

Adjusting Selections to a Zero Crossing

A zero crossing is a point in an audio file where the amplitude is zero. When you edit an audio file in the File Editor, if the beginning or end points of your edit do not occur at a zero crossing, the edited audio file can have unwanted noise at the beginning or end of the edited area or both. Subsequent editing of the file, such as normalizing or increasing the gain, can increase this unwanted noise.

Once you have made a selection in the File Editor, you can fine-tune the selection so that it begins or ends at the nearest zero-crossing point.

To adjust a selection to the zero crossing
  1. Make a selection in the File Editor.

  2. Choose Edit > Adjust Selection to Zero Crossing and choose one of the following from the submenu:

    • Inward

    • Outward

    • In Point to Left

    • In Point to Right

    • Out Point to Left

    • Out Point to Right

The edit point is adjusted to occur at the specified zero-crossing.

Moving Between Selections

You can select different areas of the audio file to apply different actions or to play different areas. Any selection can include the same part of an audio file as another selection. As you work on the audio file, you can move back and forth between selections.

Figure. Previous Selection and Next Selection buttons displayed.
To move to the previous selection
  • Click the Previous Selection button above the waveform display.

The previous selection becomes the current selection. The selection area appears darker than the rest of the waveform.

To move to the next selection
  • Click the Next Selection button above the waveform display.

The next selection becomes the current selection. The selection area appears darker than the rest of the waveform.