Usually I would record audio into Ableton and use a DSRL cam at the same time just for video recording. I will bring the audio and video track together in some video editing software later. That process takes some time to do though.

Is it possible to record the audio directly into the iPhone or iPad? I am currently using an RME Fireface UC. But I am not sure how to get the audio from the soundcard to the Apple devices ?

Thanks a lot !