Audio input with iPad
Is it possible to to feed an external audio source, such as a line level from a mixer to an iPhone or iPad for the purpose of recording a video?
iMac, OS X El Capitan (10.11.3), DAW Studio One
You'll want to look for a 3ʳᵈ party Lightning to audio input adapter.
One example: http://www.bluemic.com/products/mikey-digital/