I notice something on the Audya that I would consider to be a flaw in the way the transposer works.
I save my registerations to match the song I am doing and name it with the song name so that when I call up number 11 regis for example I will know its for eg Rock Me baby. I sometimes also save the transpose value and lets say Rock me Baby is transposed by +1 its then saved in the registeration.
But, if my next song is a midifile and i forget to switch Off registeration button and inadvertently use EXIT [ to close the page and then open Midifiles] I find that when i load the midifile it has been transposed by +1--which is the value I used to transpose the previous registration .
On the x4 I could switch directly to Midi or back to Registrations without affecting the transposition.
On the A4 audya---Not Good !!