After some weeks of intensive work, I have uploaded a Linux USB2 driver for the Mytek.
It's based on the USB2 driver for the Terratec 6Fire currently available in the kernel. I have adapted it to work with the Mytek.
With thanks to Jesus from Sonore for getting some documentation.
You'll have to compile the driver yourself, instructions can be found in the INSTALL, FIRMWARE, ISSUES and README.md files.
my github repo
Let me know how it works!