I'm working on a song that is slow tempo and has no difficult technical parts. The transcription I have seems to be good, and seems to line up to what I can make out from the recording. The problem I am having is memorizing each little section. The bass line seems to have a few "themes" that run through each section, but every time through a section, the line changes. I struggle to remember which fill/line to play at each section. Any advice for learning songs like this? My goal on this one is note-for-note playback, since there are quiet parts where changing the bass line would be noticeable.