audio waveforms
Visual representations of the actual sound. Audio waveforms appear in clips in the following ways:
As the bottom portion of a video clip, colored blue
As a detached or an audio-only clip, colored green
![Audio clip selected in timeline](https://help.apple.com/assets/657CD3DE95505DC352004EFC/657CD3E295505DC352004F02/en_US/89f9cc23531559ed275e7097d48963b2.png)
In iMovie, audio waveforms change according to a clip’s volume level or applied effects. The waveform appears larger when the volume is high and smaller when the volume is low.