Audio Tracks

From Audacity Manual

An audio track containing digital audio has a Track Control Panel, a vertical scale with units (except in the Pitch view) then the representation of the track itself (by default this is the "Waveform" view as in the image below). New tracks are created whenever you import an audio file or record into your project , can be generated with particular types of tone or noise. You can explicitly add a new track to your project with the Tracks > Add New command.

Stereo Track:

Mono Track:

Track Control Panel

:	The Track Control Panel (at the left of the audio track) has controls and status indicators on it for this audio track.

Controls

Close Button:

Clicking this button will close the track, removing it from the project.

Track Drop-down Menu:

Clicking on the track name shows the drop-down menu giving various options that affect this track only. Newly created tracks are named "Audio Track". Options in the drop-down menu include changing the name, sample rate how the track is displayed and options for converting from stereo to mono.

Mute Button:

Click to silence this track when playing. Click again to unsilence. Muted tracks are not exported.

Solo Button:

Click to play just this track. Click again to cancel. Solo takes precedence over mute - the mute buttons usually have no effect whilst any solo button is down. There are three options for exactly how the solo button operates, described in Tracks Preferences. One of the options is not having the solo button at all.

Gain Slider:

Set the gain for this track. Hold down the shift key while dragging to adjust the slider in finer increments. Double-click the slider to bring up a window where you can make precise adjustments or enter a gain value.

Pan Slider:

To make signal stronger on left or right earphone. Hold down the shift key while dragging to adjust the slider in finer increments. Double-click the slider to bring up a window where you can make precise adjustments or enter a pan value.

Track Collapse Button:

Click on this to make the track 'fold up' into a smaller size. Click again, or drag the lower edge of the track to restore the size.

Move the entire track up or down in the list of tracks by clicking on the Track Control Panel and then dragging up or down.

Status Indicators

Track Information Area:

Gives in order, Stereo or Mono, the sampling rate in Hz and the manner in which samples are represented.

Sync-lock Indicator:

When present, indicates that this track is part of a Sync-Locked group. Note that the Sync-Lock Tracks feature is available only in 1.3.13.

Vertical Scale

The vertical scale displays amplitude when showing the waveform, frequency when showing the spectrum or is empty when displaying pitch.

When the mouse is over the scale it changes to a magnify icon. Click to increase the zoom, shift-click (or right-click) to zoom back out. This is a zoom in the vertical direction, and is used more rarely than the zoom on the time axis. See Zooming which covers both vertical and horizontal zooming.