Kevin Osching, Tuba player says sometimes it is hard because it takes longer than a week to learn a song and you tend to forget the national anthem which is what we are learning. Since January Kevin’s been coming here for lessons, alongside 20 or so other aspiring musicians. They're part of a project called Ghetto Classics, which teaches deprived children in the slums how to play an instrument. But progress is slow. They rarely get to rehearse with instruments.