My friend, John, writes: The music score showing on the ipad screen is a scan from the Real Book . Method: I emailed the Word .doc to myself and received it in the iPad Mail app, then moved it into Pages (iPad App), where you see it. The scanned pages were imported into a Word .doc on my PC.
The iPad is placed on the midi keyboard, and the score is referenced while using the music software on the PC to play the music and record it.