[Dupe]

The built in Bluetooth module in the SX900 does not support MIDI over Bluetooth. Only audio over Bluetooth. So that will not work.
If you want to use bluetooth to call up registrations, you will need to add (buy) a Yamaha MD-BT01 adapter or something equivalent for that purpose.
Alternatively, and since you are using an iPad, you should be able to accomplish what you want to do, using WIFI (in stead of bluetooth).

Rudy

Hi Rudy, Thank you for your prompt reply. Can you explain how WiFi would work please. Regards Dupe.