So I think what I need is a cheap(ish) little small-footprint interface that I can sit on my piano and connect my ipad to. My DP also has a midi-usb host and standard midi connectors so I could use it as a midi controller.
I've found the Tascam IU2 (which seems to have been discontinued) and the Roland Duo-Capture EX (which I don't think is out yet). These interfaces have both midi and audio connections. The Tascam is considerably cheaper.
I was also looking at an Apogee One which has a built in mic but I would need the CC kit and a usb hub (also only mono - my DP has a stereo output)and it doesn't have midi.
Sound quality is not paramount here since I just want to be able to sketch ideas.
Are there any other (cheaper) options that I may have missed?
Thanks for any help