Remembering every single word of your essay, particularly a generic essay is very dangerous, how do you know the points you are arguing will be incorporated with the related text perfectly? to maximise your marks, you should do several things
1)ask your teacher for a sample audio related text and try to practice your assessment task condition under exam condition-what topic is your assessment task on anyways and have you been given the question?-if your teacher are unwilling, try to ask if anyone knows a previous year student who had done this task and ask them for tips
2)prepare other points-techniques, quotes and ideas about prescribed text-essentially paragraphs that also relates to the question but different from your essay-because the more paragraphs you prepare-the more flexible you can be-and the more likely you are going to answer the question as well as relate that related text to your essay very well
3)make sure you ask the teacher for a marking criteria and after each practice run-get someone to mark your essay for you-whether it is the teacher, tutor, find someone to give you some constructive comments on your essay content and structure-don't just keep practice memorising if your essay potentially have faults within it
Truly I will repeat this, please don't memorise your essay word by word-just remember your overall arguments and techniques and quotes, the more detailed you remember your essay, the less likely you will be able to incorporate your related text effectively, and the more likely the teacher is going to detect this is a pre-prepared essay that does not answer the question in a coherent manner-and that is how you lose marks, hope this helps
and best of luck for your assessment task