... One problem - all my 8 registration memories have switched to the new styles and sounds and I have lost my previous saved registrations. Are these now lost forever and how do I clear the memories without affecting the new installation? ...
Hi Frank,
installing new Expansion content on the keyboard does not affect your Registriation Memory. But when you load another Registration Bank (e.g. a bank that is included in an Expansion Pack), the Registrations on your Reg Memory buttons (1 - 8) will be changed of course.
If you have memorized your own settings on the 8 Reg Memory buttons (by pressing [Memory] button, ticking the desired checkboxes and then pressing the desired Reg Memory button), you must always also
save the whole Registration BANK (as a file in the User drive or on the connected USB stick). The number of possible Registration Banks (each with up to 8 Registrations on the 8 buttons) is practically
unlimited , only depending on the available space on the drive used. But Registration Bank files are very small (only about 20 KB) so you don't have to worry about storage space.
Regarding the Registration Memory, please refer to SX900 Owner's Manual, pages 86 - 86, and SX900 Reference Manual, pages 86 - 90.
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https://uk.yamaha.com/en/products/musical_instruments/keyboards/arranger_workstations/psr-sx900/downloads.html#product-tabsHope this helps!
Best regards,
Chris