AudioNote is a fantastic note taking app. The official description from the app store tells you how you can synchronise notes and audio with each key point being linked to the moment when the lecturer talks about that subject.  Because it works on a tablet or phone there is no need to wait for the laptop to boot up.

Bookmarks can be created throughout the audio recording to highlight important points for easy referencing.  It allows you to take pictures and insert them into your notes and AudioNotes can be exported to Evernote, saved and organised there. A yellow background can be used instead of white for those with visual stress/sensitivity. It costs £2.99 and is available from the iTunes store.

This YouTube video is a good introduction to AudioNote

This comes with thanks to the Disability Advisory Service at Imperial College