When I owned my Audya 5, I tried creating some Audio styles from scratch using the Ketron Archaic "Assebler Code" tools they give you and I basically pulled all my hair out and gave up. They don't have the process documented very well anywhere. And I've seen some arguments regarding Yamaha proprietary Audio styles. When was the last time you were able to move a Ketron Audya Audio style to a Korg or Yamaha keyboard?

Ketron has at least a 7 year (est.) leap on Yamaha on Audio drums/styles. You can be damn sure with their resources, they will catch and surpass Ketron on the sheer quality and quantity of audio styles quickly based on customer demand. Just give them some time. Their business model actually works; if you want more styles, just log on to YamahaMusicSoft and buy them. If you don't need any additional styles, don't.

At least they give the customer options and expansion capabilities. Moreso than any other manufacturer; even Korg. Love them or hate them, you at least have to give Yamaha their due in providing options and support for their customers.