Hi.

If I remember it correctly, there was a Convert-disk supplied with the KN5000.
Yamaha and Solton was among the files that could be converted by use of the keyboard.
But.....
Years has passed by, and there are some differences in the stylefiles structure as well. As i.e. Yamaha SFF, SFF2, audio etc...
I've been using EMC, but be prepared for some, or a lot of tweaking and revoicing to make it sound reasonable well.
That's the same regardless of what way between different brands to convert.
Btw, EMC can 'batch convert' automaticly, so to convert a raw bunch is fairly quick, but then the 'hard and fun work' starts. 😊