This function creates a new audio emitter and returns the index for it. This index should be stored in a variable for all further functions that relate to this emitter, and then when it is no longer needed it should be removed from memory using the function audio_emitter_free() to prevent memory leaks which may eventually crash your game.
The audio emitter is created with the following default settings:
audio_emitter_create();
s_emit = audio_emitter_create();
The above code creates a new audio emitter and assigns its index to the variable "s_emit".