There's a software program called EMC StyleWorks which can convert styles from one brand to another. It gets updated periodically as manufacturers introduce new models. It could certainly convert early 2000s Yamaha styles to play in the Ketron SD1. So the real question you need to ask AJ is: Can the Audya play older Ketron styles formatted for the SD1 / SD3 / SD5 etc. If his answer to that question is "yes" then you can buy the StyleWorks software and convert as many styles as you need.