Whether I play with usb cable or with aes / ebu with my Lumin U1mini, this stays on usb !! I do not understand
If you keep the USB cable plugged in, then it might be that it takes precedence over any other port.
Could be so
Please disconnect USB if you want to use AES / BNC / coaxial / toslink output.
Yes, USB has precedence over all other ports.
Okay, good to know, but I will not disconnect anyhing because i use the usb connection only when playing dsd files