I would like to bew able to send a Tune Request to my Roland Jupiter-8 (w/Encore MIDI) from my iPad. How do I set it up in MIDI Designer? The Encore manual says that the sysex Tune Request is F6, so i tried setting up a momentary button to send sysex "F6", but nothing happens. I also tried a toggle switch. What am I doing wrong? From what understand, it's a "system common" command, which doesn't require device ID's, etc.(?)