Qu-16 and Windows Drivers

Hi,

I have a basic requirement to send a mix output (Main LR, or another mix) via USB-B Streaming to a Windows recording device. I have installed the latest Windows WDM/AISO drivers (v3.34.0).

The only Windows “Recording Device” I see is “Qu-16 Line”, but which output mix/channel on the Qu-16 does this refer to? In Audacity, I just see this as a stereo channel (I can’t see anywhere to select any of the 1-24 tracks which might be seen in a DAW). Where is this “Qu-16 Line” tapped on the desk?

In the Window Sound GUI, it has a meter, and I can see the presence of signal, but Audacity shows nothing when recording this channel.

(In I/O Patch - USB Audio, no changes have been made - channels 17 and 18 are mapped to LR-R and LR-R).

I feel I’m missing something obvious!