This is called a patent- Definition---government authority or license conferring a right or title for a set period, especially the sole right to exclude others from making, using, or selling an invention
The recording misses opportunities to use sound effects instead of stage directions: Stage instructions are not important in an audio recording, since the movement of the actors will not be seen. For this, recording should display sound effects in place of the instructions to improve the listener's understanding.
The recording follows the original text instead of reinterpreting it: The recording follows the text to the letter, to let the quality of writing is followed with quality.
I would just explain to them how poetry is a way of writing in order to capture physical and emotional details unable to be written in factual writing. Hope this helps :-)