Audio files can be added to a slide by going to "Insert" in the upper settings menu, then Media and selecting Audio.
The Audio element allows you to record a track using your device's microphone or upload an audio file. The audio interface works and looks the same both in Outline and Design views.
A Sound icon will be displayed in a corner of the slide for you to be able to access it. Hit the Record button (red circle) to start recording and then the Stop button (red square) when you're done.
In order to Upload an audio file, just hit the green cloud button and select it from the files browser. You'll be able to listen to it and decide to save or discard it.
Using more than 1 Audio track
We encourage you to keep things simple, however, the option exists to add as many Audio tracks to the slide as you need. If you have more than one Audio track, use the Animations feature to organize the sequence.
If all elements are tagged with number 1 and all elements are inside the "Step 1" box, it means they will all show up at once when you present.
In order to change the elements order, just drag and drop them from "Step 1" box, to "Step 2". Consecutive steps will be added automatically for you to drag and drop elements accordingly.
Audio while presenting
When viewing the slides, the audio track/s will be reproduced automatically and can be paused by clicking the Audio icon.