PiersW wrote:I have just played both tracks through the al22 and they play fine. I admire your loyalty to your licensees but don't you think it looks like the al88 is either faulty or not quite there yet?
Ha! This is a very interesting observation too!
Actually, I never told that the AL-88 is not the cause

But I'm trying to find a logic explanation to the issue... and I can't.
The fact that you got All Note Off/All Controller off on the AL-88 output makes me thinking about a connection loss, because the AL-88 is generating such messages when it is disconnected from its sources. Since you don't get it at rest and the issue is still present when you are using a straight cable between the PC and the AL-88, I supposed that the AL-88 was not faulty...
But this new observation with a AL-22 is changing my mind. If the setup is working with an AL-22 and not working with an AL-88, it can be considered as a proof that the AL-88 is not working properly. You are right.
I'll contact Alyseum to give my feedback about the tests and ask them to contact you asap.
Cheers,
/Phil