I have USB 1 of the mixer connected with my laptop (current model) and play there via SERATO.
USB port 2 of the mixer is connected to my streaming PC (a high-performance special audio PC!) with OBS.
The mixer is unable to send a constant signal to the PC via USB port 2 - regardless of the buffer size. There are always dropouts.
The X1850 has the latest firmware. The streaming PC has the latest driver for the DENON X1850 installed.
CPU utilization on the streaming PC is NEVER above approx. 25%.
As a test, I connected another PC INSTEAD of the streaming PC on USB 2 of the mixer: The exact same problem exists here, too!
And of course I have tried different USB cables, even the one from USB Port 1: same problem with this cable on port 2…with the cable that works seamlessly on port 1…
Conclusion: the problem does NOT come from the PC, but from the mixer.
If I put the audio signal via the X1850’s analog master out into a USB interface that is connected to the streaming PC, everything works perfectly. DENON sells the mixer with the “2 USB ports” feature…but it does not work reliably!
I’m slowly losing faith in the DENON DJ brand as this is now the second major problem within the first year (broken fader, but that can happen. It’s a shame, I’m actually a big fan.
