How do I get Roon to forget a DAC which used to be connected to a streaming endpoint via USB?

[Jeffrey_Moore]

Connected Audio Devices

This zone is using a Lumin U2 Mini, which used to have a Schiit Yggdrasil connected via USB, and now has a different device connected via S/PDIF.

Description of Issue

This Lumin U2 Mini was in one room, and had a Schiit Yggdrasil downstream via the USB 1 on the U2 connected to the Schiit’s Unison USB input.

The Yggdrasil was detected and reported by name, but was still noted as “unrecognized.” In Setup/Audio/[this zone] I was offered the opportunity to browse for the device I knew was connected and set it. I found the Yggdrasil listed under Schiit, and chose it as the connected device; after that, Roon showed a nice line art image of the Yggy for that zone.

Where it got weird is that later I moved this Lumin device to a different room, reactivated the coax S/PDIF output, and used that S/PDIF output for the DAC in the new room. The problem is… somewhere in Roon, it’s remembering the Schiit DAC which used to be connected via USB.

For instance, here’s what’s shown at the end of the signal path when playing to the device in question:

So… is this phantom Yggy there because I manually chose it as part of the earlier setup?

How do I remove it?

I tried clicking “Load defaults” in the Device Setup for this zone under Settings/Audio, and that didn’t do the trick.

Thanks!

[bearFNF]

I would guess that it is not letting go of the Yggy. Have you tried rebooting the core?

Under settings Audio do you have the “identify this device” option? If so, click on it to pick from a list:

Or do you see "not your device? If so, click it and it should reset it to “identify this device”

However, that being said, my KEF LS50W entry in settings/audio does not give me any of these options, so, YMMV.

[wklie (Peter Lie)]

In Roon settings → Audio, disable Lumin.

Shutdown Roon Core and Lumin.

Unplug all cable / DAC from the Lumin.

Power on Roon Core and Lumin.

In Roon settings → Audio, enable Lumin.

Restore your DAC connections.

[Jeffrey_Moore]

@wklie

In Roon settings → Audio, disable Lumin.

Shutdown Roon Core and Lumin.

Unplug all cable / DAC from the Lumin.

Power on Roon Core and Lumin.

In Roon settings → Audio, enable Lumin.

Thanks! But… that didn’t actually do it. The memory of the Yggy remained.

But I figured maybe it would help if I scrounged up some USB audio device to plug into the U2, to force Roon into a state where it again thought a USB output device was primary on the U2 – whereupon it might start showing me the opportunity to edit stuff. And indeed it was so, when I scooped up a Matrix X-SPDIF bridge and plugged it in.

It showed me this:

…giving me the opportunity to click on the hot “Not your device?”, which cleared out the remembered Yggdrasil and dropped me back to:

…which was promising! After I unplugged the X-SPDIF… well, it still showed up as if the X-SPDIF was still plugged in, but after a U2 power down, a Roon Server stop and restart, and powering the U2 back up (I’m not sure which of those were strictly necessary)…

eventually we got here, which was the goal:

So problem finally solved!

[Jeffrey_Moore]

Thanks! You were on the right track, but my problem was that the “Not your device?” option wasn’t showing up.

It turned out that I had to plug in some sort of USB audio device, whether or not I intended to actually use it, to get the Roon software herded back into this corner of the UI so I could then tell it to forget the irrelevant device.

And after that I could unplug that unused USB device and get back to the S/PDIF-only configuration which was of interest.