Audio waveform
A visual representation of the sound in a recording, shown along the bottom of video clips and audio-only clips in Final Cut Pro.
An audio waveform’s height (amplitude) and length change according to the underlying sound’s volume and duration. A short, loud sound such as a drum beat has a sharp, peaked waveform, whereas low-level crowd noise has a lower, more uniform waveform. These properties make it easier to find specific edit points when trimming clips or keyframing effects.