It's all about making the connections between what you're hearing and what you understand is going on. Your A-Level Anthology should be heavily annotated with all important explanations in there. The best way to approach this revision technique is to grab some scrap paper, have the audio track at the ready, and your annotated anthology in front of you. Then proceed with the following:Press play on audio, stare at your score, and write down any annotations on your scrap paper that you can see on the score when you hear that part being played. (Writing is a very good way of reinforcing information) Sometimes the music is fast, and there is too much to write down at once. In this case, split your audio listening sessions into sections based on the structure of the piece, and repeat playing that section until you've written down all annotations/important points. Close your anthology, listen to the audio track and write down everything you can remember as you are hearing those moments being played again. Often there's too much to say, so repeat the audio track until you think you've covered everything. (This is to test how much you can remember, and find out what it is you don't know)Look at your annotated score, and with a different colour, write down any points and moments or areas of the piece that your memory didn't catch in step 2 - those are your gaps and you need to focus on those. You can highlight them in your anthology to make those annotations stand out if that helps.Repeat steps 1-3 until you are confident you can make connections between what you hear and your analysis. Revision is all about understanding and repetition. Throughout all this process, make sure you understand all the annotations you've got, if you are unsure e.g why you wrote that bar 63 is a perfect cadence, look it up, focus, and spend time until you understand what's going on.