Decide Whether To Confront A Noisy Neighbour

It is gone eleven and the bass has been going for two hours, and you are stuck between wanting a quiet life and wanting an actual quiet life. This weighs a direct chat against a formal complaint and tells you which fits your situation, plus an opening line if you are going to knock.

You are weighing up whether to raise a noise problem directly with a neighbour or go straight to the council or landlord. Describe the situation: what the noise is, how long it has gone on, and any previous contact you have had with the neighbour. Then help me decide between three routes: a friendly direct conversation, a written note, or reporting to the landlord or council, weighing up the risk of making things awkward against the risk of the problem continuing. Give a clear recommendation with the reasoning in three sentences or fewer, followed by one suggested opening line if a direct conversation is the best route.