I’m really sorry about your problem.
I still not received any recording samle, and detailed description about your setup, or any details about your headphone.
I don’t want to say that your mistake, but I double checked the spam folder as well, but I still not find your recording samples or any emails from you.
We hearing our users feedback, and we try to implement everything which can possible.
We did the same thing with that headphone output request as well we already implemented a new mixer in the uTrack24 which can helps in this situation.
We will include that feature in the coming firmware release.