Organ pipe whose tone is produced by air passing across the sharp edge of a fissure or lip.
1The flue pipe works just like a whistle.
2In the Pedal department no reed or flue pipe can begin to compare with a Diaphone, either in attack or in volume of tone.
3They burn this wood using stoves that don't let most of the nasty stuff escape into the room, but rather go up a flue pipe.
4There's the flue pipes and the reed pipes.