>Manuel Op de Coul In the tuning list wrote:
> The museum also has a 12-tone harmonium with a von Janko keyboard
>from around 1900, built in Vienna. It has 3 rows of 25 and 3 rows of 24
>keys. When you press one key, two more go down, so there are only two
>independent rows .
>Can any of the listers tell me where in the Web could I get some
>detailed image of this kind of keyboard?
>I tried hard: the searchers got thousands of sites about Janko Keyboards
>but computer keyboards, to type. Only one reference to a piano in an
>English museum, and the image was a photo of said piano from far away...
The rows are in whole note steps: c-d-e-f#-g#-a# and c#-d#-f-g-a-b. These
are staggered by a half spacing to the right and alternate. All of the
keyheads giving the same note move together since they are part of the same
key. The idea is to be able to play in any key with the same fingering.
Keyboard Instrument Maker