Hi again Thomas
Yes, trial mode still working: I should probably point out I enabled the pro trial through the 'free' version, so I have both this and the 'basic' version on the iPad.
Mute not enabled on the pro version, and neither is there signal coming in or out via the meters, in either standalone or within Audiobus while the Focusrite is connected. The audio routing in setup indicates input channels 1 & 2 and output channels 1 & 2, which I'd presume would be the default? Interestingly, in Audiobus, the 'arrows' between Input, Effects and Output are 'vibrating', indicating that audio should be flowing through, but I'm hearing nothing... as soon as I remove the 480 from the chain, the audio comes back.
While I was typing this, the pro version trial just ended, so glad I checked when I did! It does seem though to be something to do with the Focusrite/Lightning connector setup, because the 480 still works fine using the iPad's internal mic and headphones.
iPad settings perhaps? Or has there been an update with the 480 recently? As mentioned this was all working fine not long ago - the last recordings I made in Loopy when the 480 was still working back in early July. I've also removed and reinstalled the 480 several times, to no avail. At worst, I suppose I could forgo the Focusrite altogether and record using the iPad mic, but I did want to be able to use a decent condenser mic through the Focusrite, as well as d.i. guitars, keyboards etc.
I've just about run out of ideas, apart from reformatting the iPad, though I'm loathe to do this... does anything else come to mind?