As usual Steven, you and I think alike (scary for you :-)). I often pop the iPad out and stand and speak using the iPad for my notes, either holding it in my hand or resting it on a podium or music stand. It is easy, and then when I'm done I sit down at the keyboard, pop it back in and I'm off playing and singing again.
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Graham, Korg Pa1000, Korg G1 Air, Countryman E6, Roland BA330, 2 x Roland CM-30, , Mackie SRM150