Noise From a legal point of view (sorry to sound dull, but this was in the original question, and I actually know about this). There is no time scale involved in music/noise, that causes someone annoyance. You could be practicing at 2pm and if someone thinks that it's excessive and the cops agree, then you get done and the equipment that you're using to generate the noise goes with them when they leave. You then have to pay THEM for the storage and you could end up in court over it too... Nasty, costly and sort of unnecessary once you know these rules!! Trust me... experience can hurt!!!! All about respect at the end of the day, and even if your neighbour basically doesn't like you and just likes getting you in the shit, it doesn't matter, if they want to, they CAN stir up a lot of shit for you... take the advice about the electronic version, or go to a rehearsal/practice room!