This function will get the position (in seconds) within the sound file for the sound to play from. The sound can only be a single instance of a sound (the index for individual sounds being played can be stored in a variable when using the audio_play_sound or audio_play_sound_at functions).
|index||The index of the sound to get the play position of.|
if audio_sound_get_track_position(global.Music) != 0
The above code checks a track to get it's start position and if it's not 0 seconds it sets it to 0 seconds.