In rare cases (mostly for very old Casio models like the CTK-6000), the official driver may not support Windows 10. Casio has not updated drivers for some legacy keyboards (released before 2015).
In your DAW (e.g., FL Studio or Ableton), go to settings/preferences and select the Casio driver under the MIDI Input/Output devices. casio usb midi driver windows 10 64 bit link
Legacy Casio MIDI drivers often struggle to communicate through newer USB 3.0 or USB 3.1 ports. In rare cases (mostly for very old Casio
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