Audacity Tracks and Clips

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An Audacity project can contain as many tracks as you want. Each track can contain several audio clips which can be moved around independently, but share several properties of the track such as its overall volume, panning, sample rate, and sample format.

Track one with two Audio clips

The Audacity project shown above has three tracks ("Sax 1", "Sax 2", and "Drums"). The first track has 2 clips, the second track has no clips, and the third track has 1 clip. A clip can be moved from one track to another simply by dragging it using the Time Shift Tool:

Audio clip moved from track one to track two

All audio files that are imported or new audio that is recorded goes into a new track. Afterwards, you can move or copy and paste audio into existing tracks. To split a track into multiple clips, select part of the track and choose Split Cut from the Edit Menu.

Many track properties can be accessed by clicking the title of the track, near the upper-left corner, bringing up a menu something like this:

The Track Menu The options in this menu are described at Track Drop-Down Menu.


Stereo

Stereo Tracks contain a single label area to the left with two waveforms on the right. The top waveform represents the left channel and the bottom waveform represents the right channel, as in this example:

A typical stereo track

By default, the two channels of a stereo track are always edited simultaneously. However, you can split them apart and work with them independently by opening the track menu (see above) and selecting Split Stereo Track.

- ToDo THIS IS OLD CONTENT FROM Tracks and Clips WHICH IS NOW DELETED. PLEASE MERGE IT BY CUT AND PASTE INTO THE ABOVE...

Time Shift Tool now has a better description of how to use it where it's needed most, so don't duplicate what is said there.

The terms channel, track, and clip can be a little confusing, especially because some programs may use them to mean slightly different things. Within Audacity, the meaning is always consistent:

  • A channel is for audio input or output. Audacity can record 2 channels of input (stereo), and more if you have a special sound card or audio device that supports more than two simultaneous channels. Audacity only supports 2 channels of output, no matter what kind of audio hardware you have.
  • A track is one instrument in your symphony, or one voice in your dialog. You can have as many tracks as you want, and all of them will be mixed together to create your final output, but during editing you can manipulate each track independently. If you have an interview that was recorded with two microphones, each one can go in a separate track. If you have background music, that could go in a third track. That allows you to manipulate them separately before you mix them in the end.
  • A clip is a piece of an audio track that you can manipulate somewhat independently from the rest of the track. For example, you can split up an interview into sentences and move the sentences around individually, even though they're all from the same track. Less commonly, you can move clips between tracks.

This chapter is all about how to edit your track by splitting it into clips. To adjust the relative volume and panning (stereo positioning) of tracks, see Mixing.

Splitting a track into clips

When you record some audio or import audio from a file, you get a single track. In many cases, there are natural gaps in the audio - silence between sentences or pauses between phrases in music. Those are good candidates for splitting the track into multiple clips, allowing you to manipulate the clips independently. There are five ways to get multiple clips into a track:

  • Split in the middle of an existing clip.
  • Split Cut in the middle of an existing clip.
  • Split Delete in the middle of an existing clip.
  • Paste into an empty portion of an existing track.
  • Drag a clip from a different track.

As an example, see what happens when you select Split, in the before and after figures below. After splitting, you can now move any of the resulting clips apart using the Move tool, third figure below.

Before Split
After Split
Moving a clip after splitting a track into different tracks using Split.

Moving and time-shifting clips

To move clips around independently, use the Move tool Time Shift Tool. When you click on a clip and drag it to the left or right, this is called time-shifting, because you are changing the time that audio will be heard.

The move tool can also be used to move a single clip between tracks. Just click and drag (see the before and after figures below).

Dragging a clip you're going to move to another track
Moving a clip to another track

To move multiple clips at once, select all of the clips you want to move using the normal selection tool Selection Tool, then use the time-shift tool to click and drag. If you click within the selection, all selected clips will move together. If you click outside the selection, only the clip under the mouse cursor will move (see before and after figures below).

Creating a selection so you can move multiple clips at once
After moving two clips together

Note that moving clips also makes use of guides, also seen in the chapter on Audacity Selection. When you move a clip, Audacity will snap the left or right boundary of a clip to the nearest edge of a clip in any other track, making it very easy to line up clips during editing.

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