Sounds like Casio understand and have no problem with people using their samples. But consider it from a very basic level - pressing a key and getting a 440Hz

Sounds like Casio understand and have no problem with people using their samples. But consider it from a very basic level - pressing a key and getting a 440Hz A is a sample - you can't practically stop people from recording notes - where does that stop if other more complex samples are stored in a keyboard?