I know there have been OS issues with various Ketron products. I often wonder what the user is doing to create the problem. For instance, when I got my SD7 I started downloading and auditioning legacy styles from various sites. Many of these styles had been converted from other keyboards like Korg, Tecnics or Yamaha. About 10% of these styles would freeze up my SD7 while I auditioned them so I deleted them and moved on. That said, not a single factory style has ever caused any issues at all. I also found a few midi files that would cause a problem but not all of them. So far I have found no MP3 files that were a problem.

However, I have agree about the balance of sounds in styles. Ketron does a horrible job at determining correct sound balance.

Deane