Divide audio equally is a quick way to create a Slidecast. If you choose this option, your audio file will get divided into equal parts and get synchronized among all the slides. For example, if your mp3 is 4 minutes in length and the presentation has 20 slides, by clicking the Divide audio equally button; your slides will change every 12 seconds (divide 4 minutes or 240 seconds by 20 slides).

This option is useful if you simply want to play an audio track along with your slides. You can also use this feature to start a rough synchronization and fine tune it later.

By clicking the Remove all marks button, the audio will be left unsynchronized. You can use this feature to start the synchronization again.