Rich, actually I answered your question, not Tony. The SYHD1 was not just an IDE hard drive, it was a hard drive mounted on a technics interface pcb with chips and prom software enabling communication with the micro in the keyboard. A new drive could be formatted by the KN3000 into the required folder structure. Since the technics board contained a standard IDE drive, that drive could be swapped and re-formatted. But an IDE drive on its own without the technics board is useless.

The HSO3000 pc program has nothing to do with any of this, this was only used for pc communication with the Keysoft KN3000 hard drive system that had a parallel port on the back of the KN3000. The normal (basic) technics hard drive upgrade had no pc communication capability so the software is useless with that.

If you don't have either the basic technics or keysoft SYSTEMS, ie drives on special pcbs, then it is a waste of time and would require the design of electronic interface hardware programed with new software TOGETHER with an IDE drive. Thus not worth the time or money compared with a more modern keyboard with better sounds.