OK, I won't finish today. I have to watermark the detail pictures of my scarf because I don't want someone to use them for a scam on the bay, and I need to resize the photos of the organ because they're to big for tPF.
Anyway, here come the keyboards!!! A basic organ has one keyboard. It's pretty similar to the keyboard of the piano, except for 2 or 3 things:
- the keys are usually shorter.
- the keyboard is only 5 octaves long (correct me if this is not the word to use). That means there are only 61 keys, instead of 88 like on a piano.
- on some organs, the white keys are black, and the black keys are white!
Depending on the size of the organ, there can be more keyboards. Having 2 keyboards allows to play the melody on one keyboard, and use another one to support it.
For instance on this video, with Marie-Claire Alain, who was one of the greatest French organists:
https://www.youtube.com/watch?v=hcWZexmBe20 You can watch the entire video if you're interested (there are English subtitles), or you can just watch at 2:00 a little bit of a Bach piece of music that illustrate the use of 2 keyboards.
Big organs can have 3 or more keyboards. The biggest organ in the world is in Atlantic City, NJ, and has 7 keyboards!!
Pierre Marie also drawed little round things on the sides of the keyboard (I circled one). They have their use too! They are used to push a keyboard and connect it to the keyboard directly above, or to pull a keyboard and connect it to the one underneath, depending on how they are installed. Once they are connected, if you play a note on the main keyboard, it's as if you were playing it on the second at the same time. This can be pretty useful