series.errorbar.sonification.defaultSpeechOptions.mapping

Mapping configuration for the speech/audio parameters.

All parameters except text can be either:

• A string, referencing a point property to map to.
• A number, setting the value of the speech parameter directly.
• A callback function, returning the value programmatically.
• An object defining detailed configuration of the mapping.

If a function is used, it should return the desired value for the speech parameter. The function is called for each speech event to be played, and receives a context object parameter with time, and potentially point and value depending on the track. point is available if the audio event is related to a data point, and value is available if the track is used for a context track using valueInterval.