Used this and realised why IAA is not finished.
But, IAA can only have one instance per song, not multiple instances like with AUv3. Not always the issue it might be. For that ‘special sound’ or ambient twisting audio in the background, you don’t need multiple instances with Nave, is one way to look at it. So IAA while ‘deprecated’ is by no means replaceable by an Audio Unit version, especially if the IAA connectivity is well done. GB iOS/iPadOS only sends ‘start’ and ‘stop’ MIDI signals I have measured, hence limited automation…all of which leads me to this: The Waldorf Nave has a suite of sounds that come with it, and a ‘tweak-ability’ that are beyond the norms of iOS/iPadOS. I used it for ten minutes, and already have over a dozen other iOS soft synths, and this probably makes half of them look quite weak. I recorded into GB on iPadOS on the Pro M1, messed with some setting or other, and it sounded pretty amazing.
That’s it, it’s quite something, AUv3 not being done vs this having IAA only, isn’t as bad as it might be. The intrinsic excellence of Nave, and the quality of the sound patches as standard, is why it’s not by any means done yet.