I should have mentioned this before. There are styles you will find with the .PAT extension that came from yamaha, korg, Roland etc and someone converted them for Ketron keyboards. Many of these styles are rubbish and will not convert to the .KST format on our SD7s. Also, it is these styles that often cause a problem with locking up the SD7. So far, if I use the styles from older Ketron keyboards they convert easily and seldom cause any problems. Keep in mind though, Audya styles will not work on our SD7s.