Flue pipe

A flue pipe (also referred to as a labial pipe) is an organ pipe that produces sound through the vibration of air molecules, in the same manner as a recorder or a whistle. Air under pressure (called wind) is driven down a flue and against a sharp lip called a Labium, causing the column of air in the pipe to resonate at a frequency determined by the pipe length. (See wind instrument.) Thus, there are no moving parts in a flue pipe. This is in contrast to reed pipes, whose sound is driven by beating reeds, as in a clarinet. Flue pipes are common components of pipe organs.

Stop

Flue pipes include all stops of the "Principal", "Flute", and "String" classes, and some stops from the "Hybrid" class.

Construction

Flue pipes may be metallic or wooden. Metal pipes are usually circular in cross section; wooden pipes are usually square or rectangular, though triangular and round wooden pipes do exist.

A flue pipe has two major parts, a foot and a resonator. The foot is the bottom portion of the pipe, usually conical. At its base is the toe hole, through which wind enters it. The length of the foot does not affect the pipe's pitch, so organ builders vary the foot lengths of their flue pipes depending on other factors, including the desired shape of the pipes in the façade, the height of the rackboard in which the pipes are seated, and the weight of the completed pipe.

Pipe

Pipe may refer to:

Music

Anonymous pipe

In computer science, an anonymous pipe is a simplex FIFO communication channel that may be used for one-way interprocess communication (IPC). An implementation is often integrated into the operating system's file IO subsystem. Typically a parent program opens anonymous pipes, and creates a new process that inherits the other ends of the pipes, or creates several new processes and arranges them in a pipeline.

Full-duplex (two-way) communication normally requires two anonymous pipes.

Pipelines are supported in most popular operating systems, from Unix and DOS onwards, and are created using the "|" character.

Unix

Pipelines are an important part of many traditional Unix applications and support for them is well integrated into most Unix-like operating systems. Pipes are created using the pipe system call, which creates a new pipe and returns a pair of file descriptors referring to the read and write ends of the pipe. Many traditional Unix programs are designed as filters to work with pipes.

Smoking pipe

A smoking pipe is a device made to allow the user to inhale or taste smoke or vapor derived from the burning or vaporization of some substance. The most common form of these is the tobacco pipe, which is designed for use with tobacco, although the device itself may be used with many other substances. The pipes are manufactured with a variety of materials, the most common (as the popularity of its use): Briar, Heather, corn, meerschaum, clay, cherry, glass, porcelain, ebonite, acrylic and other more unusual materials. Other kinds of smoking pipes include: