Further,

I bought the Line 6 device, in the (now) mistaken view, that I could hook up it up to MIDI on the keyboard, and the apps available for iPad would automatically see it as a hardware device and transmit from it.

How wrong I was!!!!!

There are very limited apps that actually work with the Line 6 device, and no sheet music apps that even work with midi files sending to an external device/sound module...

This is why I thought iRealBook would be a solution. But alas, no!!!

It is still a neat app, don't get me wrong. And great for mucking around with at home. But, and this is with all due respect, it is not a serious on-stage "working" app. Well at least, not for me

That is not meant to downgrade your work, just my use for the app.

Dennis