The pipe organ is a keyboard instrument that originated in ancient Greece, as the hydraulis. The hydraulis was powered by water displacing air, thus creating an air supply to play the pipes.
Modern organs are fully pneumatic, meaning that there is a blower or bellows to pressurize them. When you press a key or pedal on the organ, a valve is opened, thus admitting air into the pipe to make it speak.
The connection from the key to valve can be established any number of ways. Traditionally, when you pressed a key, mechanical linkage pulled the valve open. Also you may encounter direct electric action, like Wicks organs used. This used an electromagnet to open the valve. There is also electro-pneumatic, where an electromagnet lets air into an actuator which pulls the valve open.
Organs have different stops to control the voices. When no stops are pulled, the organ will make no sound when keys are pressed. To make sound, one must pick one or any number of stops to play. Each stop consists of one or more ranks of pipes. Some stops may make use of parts of other ranks. An eight foot stop is in unison. The not you play is the not that comes out. When you pull out a four foot stop, it sounds an octave higher, and a two foot stop, an octave higher still. You can combine these stops to make a principle chorus.
There are other kinds of stops, like mutations, which make a not that is not unison or octave, and thus create a parallel melody, which can add interest or create new sounds. There are reeds, which can play sounds like trumpets and oboes. These pipes are not like whistles, but have a beating metal tongue to make the sound out a resonator.
Each organ may have one or more manuals or keyboards. Each one controls a different part of the organ. There may be a great division, the main part. There could be a positive division, which is a smaller division. Some divisions have shades in front of them to control the volume. These shades are controlled by expression pedals.
Organs also have pedals, so the organist can play the base line with their feet, freeing hands to to the alto, soprano, and tenor parts.
And remember, an organ is only similar to a piano in the sense that it has a keyboard.
Modern organs are fully pneumatic, meaning that there is a blower or bellows to pressurize them. When you press a key or pedal on the organ, a valve is opened, thus admitting air into the pipe to make it speak.
The connection from the key to valve can be established any number of ways. Traditionally, when you pressed a key, mechanical linkage pulled the valve open. Also you may encounter direct electric action, like Wicks organs used. This used an electromagnet to open the valve. There is also electro-pneumatic, where an electromagnet lets air into an actuator which pulls the valve open.
Organs have different stops to control the voices. When no stops are pulled, the organ will make no sound when keys are pressed. To make sound, one must pick one or any number of stops to play. Each stop consists of one or more ranks of pipes. Some stops may make use of parts of other ranks. An eight foot stop is in unison. The not you play is the not that comes out. When you pull out a four foot stop, it sounds an octave higher, and a two foot stop, an octave higher still. You can combine these stops to make a principle chorus.
There are other kinds of stops, like mutations, which make a not that is not unison or octave, and thus create a parallel melody, which can add interest or create new sounds. There are reeds, which can play sounds like trumpets and oboes. These pipes are not like whistles, but have a beating metal tongue to make the sound out a resonator.
Each organ may have one or more manuals or keyboards. Each one controls a different part of the organ. There may be a great division, the main part. There could be a positive division, which is a smaller division. Some divisions have shades in front of them to control the volume. These shades are controlled by expression pedals.
Organs also have pedals, so the organist can play the base line with their feet, freeing hands to to the alto, soprano, and tenor parts.
And remember, an organ is only similar to a piano in the sense that it has a keyboard.
by the_organist March 27, 2009
by preach414 April 13, 2018
A term used for any type of gun. You use this term when someone wants to fight, but you don’t wanna use fists.
by PloWED liKe SuM CrOP$ July 28, 2019
Pipe welders are men that attract women not on looks or personality but by the massive cock bulge they have in there jeans
Susan- Mary my husband has a small dick and can't eat pussy to save his life what should I do?
Mary-well Susan I suggest you get yourself a pipe welder an dump that little dick bitch fitter...
Susan- a pipe welder? But why?
Mary- because Susan they all have huge cocks and they will suck your clit like a Hoover vacuum , not to mention they make more money and are a lot more attractive.
Cdp 11 10 90
Mary-well Susan I suggest you get yourself a pipe welder an dump that little dick bitch fitter...
Susan- a pipe welder? But why?
Mary- because Susan they all have huge cocks and they will suck your clit like a Hoover vacuum , not to mention they make more money and are a lot more attractive.
Cdp 11 10 90
by Bad mf November 07, 2013
by Freight Train Lewis February 04, 2009
jeans that fit tight to your legs all the way to your ankles (skinny jeans). very popular right now with alternative kids.
kid 1: im going to buy some drain pipes from topshop because theyre cool and that.
kid 2: oh yeah? how much are they?
kid 1: £60.
kid 2: buggar that get them in debenhams for £10!
kid 2: oh yeah? how much are they?
kid 1: £60.
kid 2: buggar that get them in debenhams for £10!
by delaney mate. May 06, 2006
by Herbert Schweffe November 30, 2021