Pipe organ
If there is a fifth manual it may be called the Echo because it has very quiet stops that echo. Alternatively, especially on American organs, it might be a Bombarde. The Bombarde usually contains loud, bold reed stops, including stops called 'Bombarde'. For instance: a State Trumpet or Pontifical Trumpet might be placed on this manual which can be heard above all the other stops playing. The Bombarde is borrowed from French Organs where it is a standard stop on nearly all the manuals and pedals. Having a Bombarde Manual is something of a luxury for an organist. It can be found, for example, on the organ of Westminster Abbey.