I have just started noticing a soft click sometimes at note transitions, in an instrument which uses AET. It's a French horn which uses an "articulation" morph with just 2 layers, and otherwise works extremely well. I've been unable to identify the circumstances necessary to produce the click - it's reproduceable if I send exactly the same sequence of messages, but on other occasions I send a sequence which is very slightly different, and there is no click, again reproduceably. Morphing is controlled by the same cc as volume and is constantly changing (I use a breath controller). There is no click when I bypass the AET. It's not related to the sound from the samples - giving a long attack time to the second note of the transition makes no difference to the click. It happens on or offline. I'm on Kontakt 5. I wonder if anyone has had the same problem and perhaps even found a workaround? I suspect it's a bug in the AET software. It's worth mentioning incidentally that this marvellous AET filter is in a dire state: the programmers couldn't have made it more user-unfriendly if they tried. It's got silly bugs - for example some of the fields for data entry have to be clicked twice before they will work, and the only way to delete a morph layer is to pretend to use it to make a new map. I get the impression it's been abandoned - is this because people don't use it much? What a shame.