Hello, Holidays over, going to school... I live in a flat, have very nice neigbours who have no problem with me blowing my horn all day, but not before 7 am and after 7 pm (they have children). One problem, I leave at 6.30 am and I'm back about half past six in the evening - half an hour left to practise . It's all right with them if I play with my cup mute. Does practising with cup mute affect one's sound?