Kurzweil keyboard problem
Today my K2500 lost it's velocity sensing on A4 key. It plays only ppp or fff - nothing in between. Any ideas you keyboard gurus?
Have you tried backing up your work and executing a full reset? At least then you would know if it is a problem in the board or a setting you may have changed.
The trigger/contact probably needs to be cleaned. It's something I'd do myself, but I don't know your level of comfort with disassembling your keyboard, cleaning it, and reassembling it.