Audio
To add audio files to your presentation, add them to your Markdown like so:

Your operating system’s file type icon will be used as a visual representation of the audio file.
Audio Layout Control
Use the same layout modifiers as with images to control the positioning of audio file icons.
leftandrightfitandfill- Percentage sizing, e.g.
25% hideto hide the visual representation. Audio will play regardless.
Audio Playback Control
Control audio playback by using one of those directives:
autoplayloopmute