In order to insert audio you will need to have the file available in your Google Drive (remember this is an MP3 or WAV file). If recording on an iOS device the voice memos are in an MPEG 4 so you will need to use an audio converter such as Online Audio Converter.
To insert an audio file follow these steps:
- Select Insert Audio
- Select your file in Drive
- Once audio is inserted you can adjust audio settings by clicking on Format Options in the toolbar and you will see the options you see below.
Embedded below is a GIF followed by a 1 minute and 9 second YouTube tutorial.