Get a bluetooth audio device that allows you to connect and upload your high quallity audio directly from the back of your equipment wireless to your recording ipad...
There are also usb audio recorders for ios, but then you would be cabled to the device you are recording, these devices are only meat for recording just audio
The video quallity of an ipad air, is good enough, because when videoing music, only the soundquallity matters...
Oh, and for making videos phones are smaller in generall have better cameras then tablets and so are better to make videos with then your ipad, my iphone 6 makes fabulous videos, way better then my ipad air.
Edited by Bachus (02/04/15 11:10 AM)