Welcome to the Forum Ponty69. Even though there are not many postings about the KN5000, there are still quite a few members who have this keyboard. Maybe all the questions about the KN5000 have been answered If you do have any questions, the expertise is here.
The following website may interest you - there's lots of KN5000 stuff here : http://home.c2i.net/gjgotaas/

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Willum
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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)