实验性
Provides duration and playback information for a sound whose definition declares a duration.
只读
Gets the total duration of the sound in seconds.
Gets whether the sound is still being tracked.
世界修改
Current playback position in seconds, measured from the beginning of the sound.
Returns the current playback position within the sound, in seconds, measured from the beginning of the sound.
Provides duration and playback information for a sound whose definition declares a duration.