It has been my experience that nearly every arranger keyboard manual is very poorly written and constructed. For a good part of my life, I was a freelance, outdoor writer and if I would have sent something that poorly constructed to one of my editors I would have been out of a job. Fortunately, we have some really good internet forums that are dedicated to solving user problems and answering most technical questions, often within minutes of them being posted.

I have, on rare occasions, contacted Yamaha's Customer Support team in California and my experiences have all been positive. I never had to contact Korg or Roland because I didn't own either keyboard for very long.

Good luck,

Gary