If multitrack clips have very different volume, making mixing difficult, you can match their volumes. Because the Multitrack Editor is nondestructive, this adjustment is completely reversible. To instead permanently change the volume of source files, see Match volume across multiple files.
To fade individual audio files, see Visually fading and changing amplitude. (The topics below address multitrack clips.)
Match multitrack clip volume
Matches a perceived amplitude you specify, accounting for middle frequencies that the ear is most sensitive to. This option works well unless frequency emphasis varies greatly (for example, midrange frequencies are pronounced in a short passage, but bass frequencies are elsewhere).
Matches a maximum amplitude you specify, normalizing the clips. Because this option retains dynamic range, it’s a good choice for clips you plan to process further, or for highly dynamic audio like classical music.
Fade or crossfade multitrack clips
On-clip fade and crossfade controls let you visually adjust fade curves and duration. Controls for fade ins and fade outs always appear in the upper-left and upper-right corners of clips. Controls for crossfades appear only when you overlap clips.
A. Drag controls in clip corners to fade in and out B. Overlap clips to crossfade
When you crossfade clips on the same track, you overlap them to determine the size of the transition region (the larger the overlapping area, the longer the transition).
To access the following fade options, select a clip, and then either right-click a fade icon in the Editor panel, or choose Clip > Fade In or Fade Out.
Symmetrical or Asymetrical (crossfades only)
Determines how the left and right fade curves interact when you drag them up and down. Symmetrical adjusts both fades identically, while asymetrical lets you adjust fades independently.
Linear or Cosine
Applies either an even, linear fade or an S-shaped fade that starts slowly, then rapidly changes amplitude, and ends slowly.
Tip: To switch between Linear and Cosine modes while dragging fade icons, hold down Ctrl (Windows) or Command (Mac OS).
Automatic Crossfades Enabled
Crossfades overlapping clips. Deselect this option if automatic crossfades are undesirable or interfere with other tasks, such as trimming clips.
Create a single audio clip from multiple clips
You can combine the contents of multiple clips in the same time range, creating a single clip that you can quickly edit in either the Multitrack or Waveform Editor.
Select a specific time range. (See Select ranges in the Multitrack Editor.)
Select specific clips if bouncing to a new track.
Select nothing to mix down an entire session.
To mixdown an entire session, see Export multitrack mixdown files.