The Audio layer allows you to import audio from your Files.
When you import a video file from the Studio, a new shot will be created with Video and Audio layers (for supported formats).
You can import an audio file from the interface by creating a new Audio layer.
To create a new Audio layer, tap on the icon to add a new layer located at the top of the layers pile, then choose the Audio layer icon. The Audio layer can be edited like the other layers. You can rename it, and manage the clips in the Timeline like the sheets of a Drawing layer.
Instead of controlling the opacity, the Audio layer allows you to control the global sound level of the layer. Some of the icons from other layers can also be found in the Audio layer. But the main differences are that you can import and record audio.
Tap on this icon to mute the audio of the layer. A second tap will unmute.
The import icon allows you to import one or several audio clips in the same layer. Learn more about import options
Tap on the record icon to record audio directly from your iPad microphone. 
When the record panel is open, tap on the record icon to start recording.
Pauses the audio recording. 
Prompts to rename the recording and creates a new audio clip in the timeline. 
Quits the panel and discards the recording. 
The audio master can be found in the top bar. It controls the volume of all the audio in the shot. Drag the slider left and right to lower or increase the audio volume.
THE TIMELINE
Every audio clip in the timeline has 2 keyframes which you can move to control the sound level of an audio clip manually.
In the timeline, if you have at least one audio clip selected, the Action Panel displays these options:
Deletes the selected audio clip(s).
Duplicates the selected clip(s). Adjusting the audio level with the slider will adjust the sound of the audio clip independently from the clip keyframes and layer sound level.
Creates 2 keyframes at the beginning of the audio clip to form an ease-in transition. 
Creates 2 keyframes at the end of the audio clip to form an ease-out transition. After creating an ease-in or ease-out, you can change the position of the keyframes manually.
You can split the audio clips the same way you would the drawing sheets and move them around in the Timeline.
An audio clip can’t be moved into a Drawing or Video layer and a drawing sheet or video clip can’t be moved into an Audio layer.
You can choose to hear the audio playing when you scrub in the timeline or not. In the Timeline parameters enable or disable Play Audio When Scrubbing.
