Audio Element

Note: The externalUrl must be accessible. The sourceDuration field must match the actual duration of the source audio file. The sum of startInSource and duration must be less than or equal to sourceDuration, which allows you to use only a portion of the audio clip in the timeline - usually startInSource is 0, and only differs from 0 when the audio node has been trimmed from the front of the source audio. When startInSource is not 0, you should set isFrontTrimmed to true. The volume field enables volume adjustments for precise sound control.

Docs - Chillin