This topic documents a feature of Binary Behaviors, which are obsolete as of Internet Explorer 10.
Sets or retrieves the Microsoft DirectAnimation sound (DASound class) played by the anim:DA element.
XML N/A Scripting [ oSound = ] anim:DA.sound
oSound A DASound object that specifies the sound played by the anim:DA element.
The property is read/write. The property has no default value.